Hey Skyline, thanks for this !
I have never used C: drive for anything except OS, and I use a lot of different drives like D: (Applications), M: (Music projects), S: (Sample Libraries, VST dll's, etc.) and V: (Video). I've had to adjust the folders in SONAR everytime a new version comes out, which takes a while (e.g. also reconfiguring a lot of other "default" items).
The tip to just install Platimun alone first is great as I normally say "all" too.
I wonder why Cakewalk can't save a previous folders configuration before an update ?