I know it's probably a stupid question, but I can't find how to update utonic. Thanks for clues :)

Download the latest install from our [download](/download) page and run it. If it finds a previous version, it will uninstall it and install the new version in its place. We try to save registration information between versions, but if we have made changes to the keys like between 2.0 and 3.0, you need a new key. To upgrade your license, just go to [your account page](/account) and there should be an "upgrade" button next to your legacy Microtonic license.