[soundboy35]

There are 2 ways to do the un-install! Do the "Safe" one if you just need the app file, and you are installing the same version. I always copy the plugins and plugin settings folders just to be safe.
If you're going to do all the cs updates, etc, I would do the "clean uninstall" and just start over.
Still copy your plugs and settings folder, and you can replace the newly installed versions.

I guess this is where the guest account on the Mac comes in handy?
Good luck!