I would like to free up some hard drive space...I realize I would have to do a custom install to restore things lost...If I miss them. V-vocal and R-Mix. Should I use Windows un-install or manually delete items?

If you run the uninstall programs then you would need to re-install X2 to get V-Vocal and R-Mix. Instead, if you don't mind leaving the installer data in the registry, you can manually delete the programs. This will leave V-Vocal, R-Mix and all the other plug-ins untouched. Assuming X1 through X3 are 64bit producer versions and all the files are in the default locations, the folders to remove are
C:\Program Files\Cakewalk\SONAR X1 Producer
C:\Program Files\Cakewalk\SONAR X2 Producer
C:\Program Files\Cakewalk\SONAR X3 Producer
C:\Program Files (x86)\Cakewalk\Music Creator 6
C:\Program Files (x86)\Cakewalk\Shared* (there are several 32bit folders, all used by MC6 and or 32bit SONAR)
C:\ProgramData\Cakewalk\Music Creator 6
C:\ProgramData\Cakewalk\SONAR X1 Producer
C:\ProgramData\Cakewalk\SONAR X2 Producer
C:\ProgramData\Cakewalk\SONAR X3 Producer
C:\Cakewalk Content\Music Creator 6
C:\Cakewalk Content\SONAR X1 Producer
C:\Cakewalk Content\SONAR X2 Producer
C:\Cakewalk Content\SONAR X3 Producer
There are also version specific folders in your user directory in AppData\Roaming\Cakewalk
Finally there are registry entries for each version in
HKEY_CURRENT_USER\Software\Cakewalk Music Software\SONAR Producer
HKEY_LOCAL_MACHINE\Software\Cakewalk Music Software\SONAR Producer
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Cakewalk Music Software\SONAR Producer
 
Here is where I have to guess a little, Music Creator has similar registry entries in
HKEY_CURRENT_USER\Software\Cakewalk Music Software
HKEY_LOCAL_MACHINE\Software\Wow6432Node\Cakewalk Music Software
I believe there will be a "Cakewalk Music Creator\6.0" in each path

All 64 bit, Thanks scook. I'll look into it.
 

Strange. I did use uninstall programs, but I didn't lose any plugins. How could that happen?

Are you saying V-Vocal and R-Mix were retained after removing the program that installed them?

Yes.
 

That is a surprising result. I would expect you still need to perform a little clean up in your user directory, the registry and maybe Cakewalk Content.

V-vocal seems to be gone. Sonar crashes when I try to insert it. It's still in the list? It should be gone. Strange. R-Mix works.
Good time to try out my new Paragon 15 backup. I believe I'll do a restore before I screw things up again. Deleting M6, X1,X2,and X3 only saved 16gb anyway.

Okay, I decided to do another backup before trying a restore. Now I should have a before and after version of my OS.
Questions I have are...(while waiting for 2 hours for the backup to complete).
1. Why is V-vocal still in the Region FX list? And why does it's absence cause Sonar to crash?
2. Why is R-mix still there? Why does it work? Is it because I have custom folders for my Vsts?
3. Why does deleting four Cakewalk daws only save 16gb? This makes me think something went wrong to begin with.
4. Would re-installing Platinum get rid of V-vocal and R-mix?...or maybe a reset, rescan?
 

1. It could be the V-Vocal registry entry is still there. The uninstall process does not clean up the registry.
2. IDK. If R-Mix was moved from the original installation path, the uninstaller would not know about it.
3. 16GB seems like a lot of free disk space. Here is a thread which breaks down the savings removing one of X series http://forum.cakewalk.com/tm.aspx?m=3179132 (I don't remember if I was looking at X2 or X3 but they are similar)
4. re-installing Platinum would have no effect on plug-ins not bundled with it. A VST reset would only affect R-Mix because V-Vocal is a DirectX plug-in.