Once you have switched to a software license key (username/password), it is important that your old USB key is not attached to your computer when you launch Domus. If your USB key is attached to your computer, Domus will read the data contained in the USB key each time it launches and you will not be able to login using your username and password.
If your USB key is attached to your computer but no longer active, you will see the relative error message upon launching the program.
This article is valid for the 2017 version and later