Close the Master TOPAZ and all Client TOPAZs.
Make sure no TOPAZ is running in the back-round.
The TOPAZ upgrade uses the default filepaths.
Earlier versions of TOPAZ used the filepath,
C:\Program Files\Datatex\Topaz Telephone Management
The current default path is,
C:\Program Files\Datatex\Topaz
Make sure of the file path when doing an upgrade.
If you moved or copied TOPAZ, make sure that the
files are not read-only.