When the Serial Number input dialog seems to not do anything, it's usually caused by:
- Another addon that is "stealing the focus", so the dialog got behind the main screen, because some other addon forced itself on the foreground. Sometimes it might be enough to ALT+TAB to find it.
- The dialog not displaying at all, because some account permissions on the system. Normally, is NOT required to run any of our software with Admin permissions (it's 100% UAC compatible), and of course our installers sets all the proper permissions to our own folders if needed, but we noticed in some cases that unusual permissions, sometimes when migrating a Windows installation after a reinstall, might require running Couatl.exe AS ADMIN. NOT required, normally, but it might help in this case.