Hi Wal,
Yes, i have done the upgrade from Standard to Enterprise.
All of the apps previously running fine after the upgrade. No unusual exceptions or errors throwing from the BTS.
I did not uninstall, in fact, when u run the installation, it will automatically detects the version of BTS you have. As a precaution, i backed up all the applications and btsntsvc.config file before i do the upgrade. After the upgrade, the apps and config file are still pretty much intact.
Hope this helps.
Yee