Version 1.5.0.8, 1.5.0.9 and 1.5.0.10 didn't upgrade the database files correctly.
This issue has been fixed in 1.5.0.11
By upgrading to this version the problem should disappear.
Else Version 1.5.0.0
To Upgrade the database files:
Close Topaz
Open the Topaz.ini (Topaz 1.6.0.3) file in C:\Program Files\Datatex\Topaz\
or older versions of Topaz the Version file in C:\Program Files\Datatex\Topaz\
Change the version number
Save and close the file
Open Topaz
Click Abort for all the error messages.