If you still have the energy (and if you haven't already tried it of course):
Disable UAC.
Uninstall TRS2004.
Delete any debris left in C:\Program Files\Auran
Run a Registry cleaner to wipe out all the old entries for TRS2004.
Reinstall TRS2004, running the installer in Administrator mode.
Then set all the TRS2004 exe files to run in Administrator mode of course.
Jeebers, what a pain (not you, the software!)
John