I think that you just opened a can of worms. I have MMSE, MMM2013 and MMM2014Premium. I was about to remove 2 versions that I had and went through the 2 main locations of files:
C:\Program Files (x86)\MAGIX\.........
C:\ProgramData\MAGIX\..............
The only things interesting to keep out of these were the Demos and Tutorials.
So I went ahead and started the process to remove MMSE(Synthesizer). Bad move! The first thing it wanted to do was to remove everything from my C:\Users\Public\Documents\MAGIX\Common\Soundpools folder. Nooooo! I stopped the process. I think everything is intact.
Then I tried to uninstal the main program. Same thing! I stopped the process.
I will raise this issue with Magix. We have to be able to uninstall previous versions without touching synths and soundpools.
Ideally, especially if you don't have them on CD/DVD, you should have a back-up copy of all of your soundpools and media in another folder - preferably on another drive.
I do, but if something gets deleted on my C drive, not long afterwards it gets deleted from the backup drive. I will make another backup. Still, removing an old Magix program should not delete all of my Soundpools. This, I find, is a serious flaw. I think it also deletes all of the synths. Thus it deletes things that never came with the program. Not acceptable!
Just to be more precise, Synth details, Soundpools and other Magix common things like Photos and Videos from Catooh, are all in:
C:\Users\Public\Documents\MAGIX\Common
The uninstall programs should not be touching this area. Users are quite capable of deleting these things as they are not associated with program files or the registry.