I found myself in the situation where my instruments were not working correctly in Music Maker Pro. They all complained about not being activated, it might have been after this weekend's upgrade, it does not matter.
In my haste/frustration to remedy the situation, I deleted their files/folders from C:\Users\Public\Documents\MAGIX\Common\MxSynth, I actually emptied out the folder, thinking that Music Maker Pro would allow me to re-download them from the store.
Well no, the store thinks that I have them already and there is no way to force them to re-download or make the program see that they are absent.
I've already uninstalled and reinstalled the program thrice. Any help would be appreciated it.