End User License Agreement — My Lil VJ
Version 1.1 — effective 6 September 2026
- Licensor: Ari Klopfer, trading as A_Development ("we", "us")
- Contact: arik@adevelopment.dev
This Agreement governs your use of the My Lil VJ desktop application, its bundled visuals and documentation, and the optional Live AI runner (together, the "Software"). By installing the Software or entering a license key, you accept this Agreement. If you do not accept it, do not install the Software, and request a refund under section 10.
1. What you are buying
A license to use the Software. You are not buying the Software itself, and ownership of it stays with us.
Licenses are sold in tiers, each a one-time purchase:
| Product | Grants |
|---|---|
| Lite | The shader deck, playlists, Layer B overlay, production output window, OBS output, and the tablet remote |
| Pro | Everything in Lite, plus the video deck, audio reactivity, the video FX rig, the GLSL post-FX chain, MIDI control, and live camera as a video source |
| Studio | Everything in Pro, plus VCV Rack input, projection mapping, and the Live AI layer |
Which features your license unlocks is determined by the tier recorded in your license key.
2. License grant
Subject to this Agreement, we grant you a perpetual, worldwide, non-exclusive, non-transferable, non-sublicensable license to install and use the Software.
The license is per person, not per machine. You may install and use the Software on as many computers as you personally use, including a studio machine and a gig laptop, provided you are the only person using that license.
Commercial use is permitted and expected. You may use the Software in paid performances, club and festival dates, installations, corporate events, livestreams, recorded video, and client work. Visual output you create with the Software is yours; we claim no rights in it, subject to section 8.
If you need licenses for a team, venue, or multiple operators, buy one license per operator, or contact us.
3. What you may not do
You may not:
- share, resell, rent, lend, sublicense, or publish your license key, or use
a key you did not buy;
- give the Software to another person, or install it for someone who has not
bought their own license;
- redistribute, mirror, or bundle the Software or its installer;
- reverse engineer, decompile, or disassemble the Software, except where that
right cannot be excluded by law;
- circumvent, disable, patch, or work around the license check, the activation
check, or the application's integrity protections, or distribute tools or instructions for doing so;
- remove or alter any copyright, license, or attribution notice.
Your license key is personal to you and functions as your proof of purchase. Treat it like a password. Your key carries your name and email address, and the application displays them while it runs — so a key given to someone else runs their copy branded with your details.
Withdrawal of a key. We may withdraw a license, without refund, if the key is published or shared, if the license check is circumvented, or if the purchase is refunded or charged back. Because the Software never contacts us after activation (section 4), a withdrawn key stops working only when that computer installs a later release — we cannot and do not disable software already installed on your machine. We withdraw keys only in the cases listed here, and a key withdrawn in error will be reissued at no charge.
4. License keys, and what the Software does not do
Your license key is verified entirely offline once you hold a key, on your own computer, using a cryptographic signature.
For clarity, and as a commitment:
- The Software does not require an account, an internet connection, or a
login to run.
- With a purchased key, the Software does not phone home, check in, or
transmit your key, your usage, your media, or any telemetry to us or to anyone else.
- Your license key is not bound to a machine. It works on every computer
you use, permanently. This is a term of this Agreement, not a temporary state of the product. The one exception is starting a free trial, which contacts us once as described in section 14.
The application displays the name and email address recorded in your key while it runs, in the operator console and on the tablet remote. It is never shown on the projector or production output, in an OBS or streaming feed, or in anything you record — your audience never sees it.
The application stores a randomly generated identifier locally on each computer for its own bookkeeping. It is a random value created on your machine; it is not a hardware fingerprint, contains nothing about you or your computer, and is never transmitted.
5. Add-ons and activation
Some optional add-ons may be sold separately. Where an add-on is delivered as a re-issued license key, section 4 applies to it unchanged.
Where an add-on or a subscription product is instead delivered as a signed activation receipt, that receipt is bound to one computer and, for subscriptions, to a paid-through date. Section 4's no-machine-binding commitment applies to license keys and does not extend to activation receipts. No such product is offered as of the effective date of this Agreement; this section applies only if and when you buy one.
If a subscription lapses, a Pro or Studio subscription reverts to Lite feature access and the application continues to run; a Lite subscription returns to the key entry screen. Perpetual licenses are never affected by this.
6. Updates
Your purchase includes free updates within the same major version — that is, all 2.x releases. A future major version (3.0 or later) may be offered as a paid upgrade. We are not obliged to release any particular update, feature, or fix.
7. Your content
The Software plays video, audio, and images you supply. You keep all rights in your own material, and we never access, upload, or process it. You are responsible for having the rights to any material you play, project, stream, or record, including music you use for audio reactivity.
8. Third-party components and the Live AI layer
The Software includes third-party components under their own licenses, listed in THIRD-PARTY-NOTICES.txt, which is installed alongside the application. Those licenses govern those components and prevail over this Agreement in respect of them.
The Live AI layer is a separate optional download for Studio licensees. It runs entirely on your own computer and requires you to install Python and a number of open-source packages yourself, under their own licenses. The diffusion model weights it uses are downloaded by you from Hugging Face under Stability AI's own community license, which you accept there and not here. Some model licenses restrict commercial use — for example, above a revenue threshold. Checking that your intended use complies with the model's license is your responsibility, not ours. We supply the runner, not the model.
9. Unsigned builds
Windows may show a SmartScreen warning on installation because the installer is not yet code-signed. That is Windows being cautious about a new publisher, not a malware detection.
10. Refunds
30 days, no questions asked. Lemon Squeezy is the merchant of record for all sales and processes refunds under its own terms. Request a refund through Lemon Squeezy or by replying to your key email. On a refund, this license terminates and you must stop using the Software and delete your copies.
11. Termination
This license lasts until terminated. It terminates automatically if you breach section 3. We may also terminate it if a refund or chargeback is issued for your purchase. On termination you must stop using the Software and delete all copies, including your license key.
12. Disclaimer of warranty
THE SOFTWARE IS PROVIDED "AS IS" AND "AS AVAILABLE", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND NON-INFRINGEMENT. WE DO NOT WARRANT THAT THE SOFTWARE WILL BE UNINTERRUPTED, ERROR-FREE, OR SUITABLE FOR ANY PARTICULAR PERFORMANCE, VENUE, OR HARDWARE.
Live performance is your risk. The Software drives visuals in real time on hardware we do not control. Test your show before you run it, and keep a fallback. We are not responsible for a failed, interrupted, or degraded performance.
13. Limitation of liability
TO THE MAXIMUM EXTENT PERMITTED BY LAW, WE WILL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, OR FOR LOST PROFITS, LOST BOOKINGS, LOST DATA, OR BUSINESS INTERRUPTION, ARISING OUT OF OR RELATED TO THE SOFTWARE, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY.
OUR TOTAL AGGREGATE LIABILITY UNDER THIS AGREEMENT WILL NOT EXCEED THE AMOUNT YOU ACTUALLY PAID FOR THE LICENSE IN THE TWELVE MONTHS BEFORE THE EVENT GIVING RISE TO THE CLAIM.
Nothing in this Agreement excludes or limits liability that cannot lawfully be excluded or limited, including liability for fraud, for death or personal injury caused by negligence, or any statutory consumer rights you have that cannot be waived. If you are a consumer, those rights apply in addition to this Agreement.
14. Privacy
We do not collect any data through the Software when you use a purchased key. Purchase and billing data is handled by Lemon Squeezy as merchant of record under its own privacy policy. We receive your name and email address in order to issue and support your license key, and we use them for that purpose only. Starting a free trial sends your email address and a one-way hash of your computer's hardware identifier to us once, so that we can issue the trial key and limit trials to one per computer and one per email address; we keep them for that purpose only.
15. General
Governing law. This Agreement is governed by the laws of the State of Illinois, USA, without regard to its conflict of laws rules, and the courts of Cook County, Illinois have jurisdiction. If you are a consumer resident elsewhere, this does not deprive you of the protection of mandatory consumer law in your country of residence.
Changes. We may update this Agreement for future releases. The version you accepted continues to govern the version of the Software you bought; a changed Agreement applies to updates and purchases made after it takes effect.
Assignment and change of entity. You may not assign or transfer this licence. We may assign this Agreement, and our rights and obligations under it, to a successor entity — including a company later formed by the licensor to carry on this business, or an acquirer of the business or of the Software. Your licence, your key, and every commitment in this Agreement survive that transfer unchanged, and no re-purchase, re-registration, or new key is required of you. We will name any successor licensor in the next release's version of this Agreement.
Severability. If any provision is held unenforceable, the rest remains in force.
Entire agreement. This Agreement, together with the third-party notices, is the entire agreement between you and us about the Software, and supersedes any prior statement or marketing description.
Questions about this Agreement: arik@adevelopment.dev