To completely uninstall USBCrypt, it's not enough to simply delete its program files from the installation folder. To completely remove USBCrypt from your computer, follow the instructions below.
IMPORTANT: If your computer is configured for several user accounts, login into the same user account that you were logged in when you were installing USBCrypt. If you use Windows Fast User Switching, log off from all other accounts before trying to uninstall USBCrypt.
The first step is to decrypt the removable drives that you have previously encrypted with USBCrypt. For each such drive: attach it to your computer, start the Virtual Encrypted Disk it contains, and copy all files out of it to your hard drive or another removable drive that is not encrypted with USBCrypt. Then stop the Virtual Encrypted Disk and run USBCrypt off the Start Menu to delete the Virtual Encrypted Disk from this particular host drive. Make sure you have moved all important files out of the Virtual Encrypted Disk before deleting it, because the deletion is irreversible!
Note that if you plan to reinstall USBCrypt later on, you do NOT need to delete the Virtual Encrypted Disks: you should be able to continue using them, as before, after you install USBCrypt back. However, make sure that each such Virtual Encrypted Disk is stopped before uninstalling USBCrypt. If Windows refuses to stop any Virtual Encrypted Disk because it still has files in use, restart the computer to release the files. (Do not start any Virtual Encrypted Disks after restarting Windows.)
You may also be prompted to restart your computer, in order to deactivate USBCrypt and release its files that are currently in use by Windows, before the removal can be completed.