To log out, you need to reset the current session data.
To do this, please browse the File Explorer for either of the 2 locations depending on software version:
C:\Program Files\Transoft Solutions\PRODUCT NAME\TransoftLogin
or
C:\Program Files\Common Files\Transoft Solutions\TransoftLogin\1.6
find TransoftLogout.exe, run it and click "Yes". Afterward, launch the software again, enter the new user's credentials (or the correct credentials).