Changing VST Folder

My VST folder is C:/VST's.  Simple, yes, but I want to get thing back to the way I use to have.  Synths in one folder, effects in another, and of course separating x64 from x86.  On my old computer, I would delete the plugins in the registry and then rerun the VST adapter, but now, with Windows 8, I'm still a little bit leery about doing anything to anything.  The question is:  Should I reinstall Sonar or can I still correct things in the registry?
 
I've got some old projects that use the OEM VSampler so I'm still using Sonar 3, plus Sonar 5, 7, 8 and 8.5.
 
Thanks.
 

You should be able to simply copy the contents of your old c:\vst folder to the new location and run Plugin Manager (after entering the new path in Plugin Manager, of course). PM will take care of the registry. 

But if you want to reorganize the directory structure, be careful that any data folders keep the same relationship in the file system to their plugin DLL. For example, Dim Pro (and many other synths) expects to find its samples in a subdirectory below the DLL. Some effects may have similar dependencies, such as those that have IR files and such. 
 
You might conceivably have an issue with some older DX plugins, but the worst case is you'll have to register them by hand using regsvr32.exe. I suppose you could also run into some weirdness with plugins that enforce draconian copy protection, like Waves. I wouldn't put it past them to require re-authorization if you move them!