Why don’t I copy ALL my VSTs into a folder called “My VSTs”? Have VP scan just that one folder and be done? Can you think of any issues? I have thought of doing this before, but now I’m asking.
I have Vegas scan only C:\Program Files\Vstplugins\. In there are all my 64-bit VST dll files, plus a sub-folder called "32-bit-not-available-as-64-bit" which only contains a couple of 32-bit VSTs that were never released as 64-bit (iZotope Mastering & Repair Suite and iZotope Vinyl). This means they still get scanned by Vegas (cuz it looks in sub-folders).
I also have C:\Program Files (x86)\Vstplugins\ containing all my 32-bit VSTs, but I don't get Vegas to scan it. Sound Forge still needs it though, cuz it's 32-bit.