Terms of Use — GBK Amplification

These Terms of Use govern your access to the gbkamps.com website, your GBK Amplification account, the Plex '87 free trial, and the Plex '87 software itself. They include your software license (Section 5) and the rules that apply when you buy one (Sections 3 and 6). Please read them before you create an account or install the software.

1. Who we are; acceptance

Plex '87 is a product of Rodrigo Koerich Engenharia e Informática Ltda (CNPJ 04.717.512/0001-24), with registered offices at Rua João Pinto, 30, sala 101, Centro, Florianópolis/SC, 88010-420, Brazil, operating as GBK Amplification("GBK", "we", "us"). These Terms apply to the gbkamps.com website, your GBK account, the free trial, and the Plex '87 software.

You accept these Terms when you create an account, check the acceptance box during sign-up, or use the software — whichever comes first. By browsing gbkamps.com without an account, you accept the sections of these Terms that concern the website itself. You must be at least 18 years old to use our services. If you do not agree to these Terms, do not create an account and do not use the software.

2. Your account

You agree to provide accurate, current information when you create your account and to keep it up to date. Your login credentials are personal to you and may not be transferred. You are responsible for all activity that happens under your account, and you may not share your account or your license with anyone else — see Section 5.4 for what that means for your license specifically.

We may suspend your account if you violate these Terms, as described in Section 12 (Termination).

3. Purchases (Paddle as Merchant of Record)

All purchases of Plex '87 are processed by Paddle.com Market Ltd and its affiliates ("Paddle"), a company registered in the United Kingdom, acting as our Merchant of Record. This means your purchase contract is concluded between you and Paddle, as the authorized reseller of the software — GBK is not the seller of record in that transaction. Your license to use the software, however, is granted to you directly by GBK under Section 5, and GBK remains responsible to you for the software itself.

For billing matters — payments, invoices, taxes, refunds, chargebacks — Paddle is your point of contact. For product matters — installation, activation, licensing, support — we are. Nothing in this Section limits any right you have against GBK under mandatory law, including, for consumers in Brazil, the joint and several liability of everyone in the supply chain under the Consumer Defense Code.

Paddle handles applicable sales tax and VAT, invoices and receipts, refunds, and chargebacks. Your purchase is also subject to Paddle's own buyer terms, which you accept during checkout: Paddle Checkout Buyer Terms.

Prices may change at any time. The price that applies to your purchase is the price shown at checkout at the moment you complete it.

4. Free trial

We offer a free, fully-featured trial of Plex '87 for 30 days. The trial requires a GBK account and periodic online validation, just like a paid license. When the trial period ends, the software stops working until you purchase a license — this is by design (fail-closed), not a bug.

The trial is limited to one per account. To keep that limit meaningful, a device can be linked to only one GBK account at a time: activating it on a second account is refused until the first activation is revoked. We may change or discontinue the trial offer for new users at any time, without affecting trials already in progress.

5. License (EULA)

This section is your license agreement (EULA) for Plex '87. It covers three separate things: what you own permanently (5.1), what depends on our servers (5.2), and what we do — and do not — promise about updates and support (5.3). Read them separately: confusing one for another is the most common source of misunderstanding about what a perpetual license means.

5.1 The perpetual license

Once you purchase Plex '87, we grant you a perpetual, personal, non-exclusive, non-transferable license (except where applicable law grants you a transfer right — see Section 5.4(c)) to install and use the major version you purchased on up to three (3) devices at the same time, on the operating systems and DAWs that were supported at the time of your purchase.

Your license requires online validation: the software validates it with our servers when you activate it and each time you load it. An internet connection is required to use Plex '87 — the software does not run offline. "Perpetual" means the license for the version you bought does not expire over time. It does not mean we promise the software will keep running forever on future hardware or operating systems — that is covered separately in Section 5.3.

5.2 Online services (activation, validation & downloads)

Activation, license validation, and downloads are provided online as part of your purchase. These services can change or be discontinued over time — software companies do not run infrastructure forever. If we decide to shut down activation, validation, or downloads for a major version, we commit to: (a) giving you at least 90 days' prior notice, by email to your account address and by a notice on the site; (b) making available to every licensee, free of charge and before the shutdown, a final build of that major version that runs without online activation or check-ins; and (c) keeping that final build available for download at least until the end of the notice period — we still encourage you to keep your own backup of your installers. If, despite commercially reasonable good-faith efforts, we cannot provide such a final build, the notice period will be at least 12 months instead.

This commitment binds any successor or assignee of our rights in Plex '87 (see Section 16, "Assignment").

5.3 Updates and support

Minor updates — fixes and improvements within the major version you own — are discretionary and free when we release them. Major version upgrades and compatibility with new operating systems or DAWs released after your purchase may be offered as paid upgrades. We provide support on a reasonable-effort basis through support@gbkamps.com, with no guaranteed response time (no SLA).

Nothing in this Section limits any obligation we have under applicable law to provide the updates — including security updates — needed to keep the software in conformity for the period required by the law of your country of residence. The operating systems, DAWs, and plugin formats supported at the time of your purchase are the ones listed on the product page and in your purchase confirmation; they define the compatibility baseline of your license.

5.4 Restrictions

Except to the extent applicable law expressly gives you the right to do so despite this clause, you may not:

• (a) reverse-engineer, decompile, or disassemble the software — except, and only to the extent, permitted by mandatory law, including decompilation strictly necessary to achieve interoperability with an independently created program (Directive 2009/24/EC art. 6 in the EU; CDPA 1988 s. 50B in the UK; 17 U.S.C. § 1201(f) in the US; Law 9,609/98 art. 6 in Brazil), where we have not made the necessary information available on request;
• (b) bypass, disable, or interfere with license validation, activation, watermarking, or any other technical protection measure — including the secure hardware or software component (the "enclave") your device uses to hold license keys;
• (c) share, rent, lease, sublicense, resell, or transfer your license or your account, except where applicable law grants you a transfer right;
• (d) extract, isolate, or reproduce the software's amplifier models, model parameters, coefficients, impulse responses, or other DSP components — whether from the software's files, from memory, or otherwise; or
• (e) use the software, or the audio it produces, to train, calibrate, or create any machine-learning model, profile, capture, or similar product that emulates the software's audio processing, or otherwise use the software to develop a competing product. Recording, releasing, and licensing the music you make with Plex '87 is of course not restricted.

Observing, studying, and testing how the software works while you use it lawfully, as guaranteed by mandatory law, is not restricted by this Section.

5.5 Anti-piracy measures (disclosure)

In the interest of transparency: the software binaries and model files delivered with your license (the "Licensed Assets") carry forensic watermarking tied to your specific license, and the software validates that license online. This means a leaked copy of the Licensed Assets can be technically traced back to the license it came from.

The watermark encodes an opaque license identifier — not your name or email address in readable form. Because we can link that identifier back to your account, it is personal data: we process it as described in our Privacy Policy, on the basis of our legitimate interest in preventing and prosecuting software piracy. The same applies to the technical data processed when you activate and periodically validate your license. We keep the link between license identifiers and your identity for a limited period after your account is closed, as described in the Privacy Policy.

Violating the restrictions in Section 5.4 results in license revocation under Section 12 (Termination) and may expose you to further liability.

6. Refunds

All sales are final, to the maximum extent permitted by law. We think this is fair: the 30-day free trial in Section 4 gives you the software at full functionality, on your own setup, before you ever pay for it. Try before you buy.

That said, some rights cannot be waived, and we honor them fully:

• Brazil (CDC art. 49): if you are a consumer in Brazil, you may withdraw from an online purchase within 7 days of the purchase or of delivery of the software, whichever is later, no questions asked, with a full refund.
• Non-conformity or defect:legal warranties against defects remain fully in force, in every jurisdiction, regardless of the "all sales are final" rule above.
• EU/UK cooling-off period:for digital content, you consent to immediate delivery and waive the 14-day right of withdrawal at Paddle's checkout, as permitted by local law. Where that waiver is not valid under your local law, your right of withdrawal remains.
• Other jurisdictions: equivalent mandatory withdrawal or refund rights under the consumer law of your country of residence remain fully in force.

Refunds are processed by Paddle, our Merchant of Record. You can request one through the checkout confirmation or receipt Paddle sent you, or by writing to support@gbkamps.com — we will forward your request to Paddle. As Merchant of Record, Paddle may also grant refunds at its own discretion, in accordance with the Paddle Refund Policy.

A refund or a successful chargeback returns your payment; because of that, it also automatically revokes the license that payment covered and deactivates any devices using it — the same fail-closed principle as the rest of our licensing system. This is not a penalty for exercising your legal rights: it simply mirrors the reversal of your payment, and it does not affect any legal warranty rights you may still have. If a chargeback is later reversed, withdrawn, or resolved in our favor — for example, where your card was used fraudulently by someone else — contact us and we will reinstate your license at no charge.

7. Intellectual property; trademarks; non-affiliation

The software, the gbkamps.com website, our brand, and all related content are owned by GBK. Nothing in these Terms transfers any of that ownership to you beyond the license granted in Section 5.

Non-affiliation: any third-party product, company, or format names that appear on our website or materials (for example, DAW or plugin-format names) are used solely to identify those products or to describe compatibility. We are not affiliated with, endorsed by, or sponsored by any of those companies. All trademarks belong to their respective owners. VST is a trademark of Steinberg Media Technologies GmbH.

8. Acceptable use

You may not use our services to:

• Do anything illegal;
• Attempt to gain unauthorized access to our systems or another user's account;
• Interfere with the normal operation of our services, including by flooding or abusing our API;
• Circumvent usage limits, including by creating multiple accounts to obtain more than one free trial;
• Violate any third party's rights.

9. Privacy

Our Privacy Policy explains what personal data we process when you create an account, use the trial, activate and validate your license (including device and connection data), and receive watermarked Licensed Assets — as well as the legal bases, the retention periods, and your rights under the LGPD, the GDPR, and other applicable data-protection laws. The Privacy Policy is a separate document and does not change these Terms.

10. Disclaimers

To the maximum extent permitted by law, the software and our online services are provided "as is" and "as available", without any warranty that they will operate uninterrupted or error-free.

Nothing in this section removes any warranty that the law makes mandatory and that we cannot disclaim — including consumer protections under Brazil's CDC and equivalent consumer laws in the EU and UK.

11. Limitation of liability

To the maximum extent permitted by law, our total liability arising out of or related to these Terms is capped at the amount you paid for the product that gave rise to the claim. We exclude liability for indirect, consequential, or incidental damages, and for lost profits, to the extent the law allows us to.

This cap does not apply to: intentional misconduct or gross negligence; death or personal injury; fraud; breach of essential contractual obligations (in which case, for slight negligence, our liability is limited to the foreseeable damage typical of this type of contract); or any liability that applicable law does not allow us to limit.

If you are a consumer in Brazil, nothing in this Section limits our liability for product or service defects under the Consumer Defense Code, and this Section applies only to the extent its article 51 permits.

12. Termination

We may suspend or terminate your account and revoke your licenses if you materially violate these Terms — in particular Sections 5.4 or 8 — or in the circumstances described in Section 6 (Refunds). Except where the violation is serious — piracy or circumvention of technical protection measures, for example — or where the law requires immediate action, we will notify you and give you a reasonable opportunity to remedy it before revoking a paid license.

You may close your account at any time by writing to privacy@gbkamps.com; see our Privacy Policy for what happens to your data when you do. Because your license requires periodic online validation linked to your account (Section 5.1), closing your account prevents the software from validating your license: it will stop working the next time you load it. We will remind you of this before we close it. Closing your account does not entitle you to a refund beyond what Section 6 already provides.

Sections 5.4, 5.5, 6 (last paragraph), 7, 9, 10, 11, 14, 15, and 16 survive termination of your account.

13. Changes to these Terms

We may update these Terms from time to time. If a change is material, we will give you reasonable advance notice — by email and/or a notice in the product or on the site — and ask you to accept the updated Terms again where required by law. Non-material changes take effect as soon as we publish them. The version number and effective date are always shown at the top of this page.

Changes to these Terms will not retroactively reduce the substance of a license you already purchased — in particular Sections 5.1 and 5.2. If a material change affects your paid license and you do not accept it, you may keep using the major version you own under the terms in force at the time of your purchase, or close your account (Section 12).

14. Governing law; disputes

These Terms are governed by the laws of Brazil, without prejudice to any mandatory consumer-protection rights of the country or state where you live. If you are a consumer in Brazil, disputes will be resolved in the courts of your domicile. Consumers outside Brazil keep the mandatory jurisdiction and legal rights of their own country.

Before starting a formal dispute, please write to legal@gbkamps.com — we would rather resolve it directly. We do not participate in alternative dispute resolution schemes, except where the law requires us to.

15. Language

These Terms are published in English and in Brazilian Portuguese. For consumers in Brazil, the Portuguese version is the binding one, as Brazilian consumer law requires (CDC arts. 31 and 46; Decree 7,962/2013); everywhere else, the English version is the binding one. Any ambiguity is interpreted in the way most favorable to the consumer (CDC art. 47 and the equivalent rules of your country).

16. General

Severability. If any provision of these Terms is found invalid or unenforceable, that provision will be enforced to the maximum extent permissible and the remaining provisions will remain in full force. This does not limit any rule of applicable law under which an unfair term is disregarded entirely.

Entire agreement.These Terms, together with our Privacy Policy and — for the purchase transaction itself — Paddle's Checkout Buyer Terms, are the entire agreement between you and GBK regarding Plex '87, and supersede any prior discussions. If these Terms conflict with Paddle's terms, Paddle's terms govern the purchase transaction and these Terms govern the software license and our services. Nothing in this clause excludes liability for fraud.

Assignment.You may not assign your rights under these Terms except where applicable law grants you that right. We may assign these Terms to a successor of our business in Plex '87, provided the successor assumes our obligations under them — including the commitments in Section 5.2. Your mandatory rights are not affected by any assignment.

Force majeure. Neither party is liable for delay or failure caused by events beyond its reasonable control (natural disasters, war, government action, internet or utility failures). This clause does not affect your statutory rights, your payment obligations, or the notice commitments in Section 5.2, whose deadlines are suspended only for as long as the event lasts.

Notices. We give you legal notices by email to the address on your account (deemed received when sent, unless it bounces) and/or by prominent notice in the product or on the site. Keep your email address current (Section 2). You give us legal notices at legal@gbkamps.com.

No waiver. If we do not enforce a provision of these Terms, that is not a waiver of our right to enforce it later.

Third-party software; attributions.The software includes third-party components licensed to us, including open-source components. The applicable notices and licenses are listed in the product's acknowledgments screen. Those licenses govern the respective components; nothing in these Terms limits rights those licenses grant you.

Feedback. If you send us suggestions or feedback, you grant us a perpetual, irrevocable, royalty-free license to use them without restriction or compensation. We will not use your feedback in ways that require attribution to you.

No third-party beneficiaries. These Terms do not create rights for anyone other than you and GBK, except that Paddle may rely on Section 3 for the purchase transaction.

Export and sanctions. You may not use or download the software where prohibited by applicable export-control or sanctions laws.

17. Contact

For formal legal notices, write to legal@gbkamps.com. For everything else, support@gbkamps.com is the fastest way to reach us. Our postal address is Rua João Pinto, 30, sala 101, Centro, Florianópolis/SC, 88010-420, Brazil.