Restore from backup (return to previos version)

Hello!

If I update my ITS to the latest version and after that notice some kind of problems - I want to remove latest patch or downgrade ITS to the version when everything worked fine. What are the correct steps to do that?

Of course, I can reinstall ITS and apply the patch level which I need - but can I go back from higher ITS version to lower one without reinstalling ITS?

I haven't find any Windows registry entries concerning ITS and ITS patches - just those for connection to SAP - which for my opinion shouldn't be changed due to patching. So there appears a question - is it possible to rewrite all files of ITS instances from backup in order to restore the previous version?

I've already tried to do that - everything seems to work fine. It shows in ITS Administration the privious version for all instances. But I'm afraid there will arise some other problems later which I don't see from the first look.

Thanks for any advice in advance!

Rorijs