I ALWAYS install a new version as follows.....
ie
for Version 8.8 C:\AwareIM880 (and change the Folder name for the shortcut when the installer asks to C:\AwareIM880 )
for Version 9.0 C:\AwareIM900 (and change the Folder name for the shortcut when the installer asks to C:\AwareIM880 )
Then for the Database.....
I use BASDB880 or BASDB900 to also keep that version specific.
Once I have migrated ALL of my apps from the previous version over to the new version and I am happy that EVERYTHING works properly
I can EXPORT the old versions of the BSVs from 880 and delete them. (Usually this will be some months. I don't delete anything until the
new version is in Production and functioning as expected.
As an aside... When I use a seperate DB for an app... I also include the Version.....
ie....
MyApp880PROD / MyApp880TEST
and now
MyApp900PROD / MyApp900TEST