In C:\Program Files\Datatex\Topaz\, the TOPAZ.ini file:
[GENERAL]
Version=1.7.0.0
DataPath=C:\Program Files\Datatex\Topaz\Data\
AutologinUser=ADMIN
AutologinPassword=
Make sure your DataPath has a "\" at the end of the file path.
Also check this file path in the TOPAZ shortcut.