In general TMS and TMSPE points to the databases, the software itself can be uninstalled and then reinstalled.
So id you go to the windows software control panel, deinstall TMSPE1.0 and then try to reinstall TMSPE1.1
That should work fine.
To be safe do a full backup / snapshort of the tms and the sql db.
Please remember to rate helpful responses and identify helpful or correct answers.