Frequently Asked Questions

A selection of some of the most common questions we receive on our support email. For a quicker answer than over email, check and see if your question is here!

My Windows antivirus is flagging an installer as malware!

Antivirus is known to throw false-positives with new software. Our recommendation would be to set an exception within your antivirus, or disable it (this is pretty common advice).

In the future we might begin to offer checksums for the more technically-inclined to check that the program was downloaded correctly.

Windows SmartScreen is preventing the program from running!

Lese plugins + application installers on windows are supported by our own self-signed code signing certificate. On occasion windows smartscreen may react poorly towards this. 


If running the installer executable makes you uncomfortable, we also provide “No Install” versions of our plugins, where instead of running an installer to put the plugins in the correct location, you just them in your plugins folders yourself.

Mac OS is refusing to open an installer!

As our programs are built for release on Mac OS, we have systems in place to automatically authenticate our software to work without issue through Mac OS. This problem shouldn’t be happening, but is most likely an issue on our part if it is. If you want to be super helpful, email us at if you catch this happening. 

Mac OS plugins aren't showing up!
This can be caused by a number of problems we’ve observed:
  • The packages may have been blocked from loading. This can sometimes be fixed by allowing Lese’s software to load within the “Security & Privacy” General settings.
  • You are using an older version of Mac OS. Apple’s recent architecture migration has… complicated… things for users and created headaches for developers. Presently, Lese plugins run as Universal 2 Binaries, which work on both Intel and M1 Mac systems. Unfortunately, older Mac OS versions may not support this functionality.
  • You need to restart. Sometimes AU plugins don’t register immediately when they are installed. Restarting can fix that.
  • I'm getting an error when trying to access a free download!

    We currently have a conflicting issue with our caching system and how we allow you to access free downloads (demos, free plugins) on our website. This is due to caching. You can make an account to deal with the issue by getting around the system, wait a little bit for the confliction to resolve itself, or download from one of our resellers.

    I found a problem with one of your plugins!

    Let us know! We would appreciate it.

    What downloadable files do I get upon purchase?

    The usual bundle of files you will be able to download is the same with almost all plugins; Two windows versions (one with an installer and one without), and the macOS version which is built as a Universal 2 Binary (meaning that both Intel & ARM Macs are able to run it without Rosetta 2, which should speed things up a bit)


    Additionally, some larger plugins with a larger amount of controls such as Recurse will also include a PDF manual for you to look over.

    How do demo versions of your plugins work?

    You can access the download for a paid plugin freely, where the paid plugin will be in a “Demo mode” by default. In this state, the sound will be periodically muted, and the saving of presets & certain other functions (like Eigen‘s impulse response renderer) will be disabled. 


    When you buy one of the plugins, a 32-character key will be generated for you and will be visible in your Account Page. When this key is inputted into the opening dialog when you start a plugin’s demo, the program will be permanently activated for that system. The keys are valid for four different systems at a time.

    I can't activate my license key!

    Occasionally some people’s DAWs will refuse to activate through the internet in the host itself. We have written an unlock utility application for users that encounter that problem. It will work most of the time (if it doesn’t, it’s likely that your CPU does not support the instruction set we use during some encryption steps & is probably very old).


    If you think you need this program, email us for a copy of it.

    Can I trust your payment systems?

    We process our credit card payments through Stripe, and our website is secured through https. Stripe is one of the most commonly used payment processors, and has yet to have any sort of security breach.

    We also have PayPal support, if you would prefer to use that.

    With both of these payment processors, we can’t access your payment information directly (even if we wanted to); All of the sensitive information is handled on their respective platforms.

    What is your refund policy?

    We will try and fulfill refunds to the same ability of our payment processors; With PayPal this is the most flexible with handling of refunds. 


    However, our limit for refunds is 30 days. We recommend trying out the demo versions of our plugins prior to buying them, just in case something is broken on your system & we haven’t gotten around to fixing it just yet.

    How do I pronounce "Lese" ?

    We pronounce it a few different ways, and we consider the “official” ones to be “lˈe͡ɪse͡ɪ”, and “lˈe͡ɪsʌ”. However, we think that the mystique of pronouncing it any way you want adds to the experience. 🙂

    How do I activate a plugin purchased through PluginBoutique?

    The serial that you recieve on the PluginBoutique platform are just pre-generated license keys. You can take the license key & paste it into your plugin when it asks for it, and you’re good to go.

    If you didn’t find an answer, feel free to hit us up at for any question you might have.