It might be because you did not shut TOPAZ
down properly.
1. Delete the TMPTopaz folder in the "C" drive.
[C:\TMPTopaz]
2. Now try to reopen TOPAZ. If you still can't
login see the following documents:
Topaz hangs after login
TOPAZ: Cannot login with username and password
Access violation when starting Topaz (after logging in)
or it might be that your database files have been
-damaged: How do I rebuild my whole data directory?