A user reported a bug on Android 7, so I decided to update my xamarin the the latest alpha build, as that was required to build on android 7 emulators.
After having the alpha build installed, my visual studio would crash after about 2 minutes of having a project open for no apparent reason, so I decided to uninstall xamarin, and reinstall the version that you refer to as "stable".
However, now when I open a solution with an IOS project in it, the project will not load, and says "This project is incompatible with the current edition of Visual Studio." - I already tried uninstalling all xamarin stuff again, and reinstalling everything, but that did not help and the problem remained...
Any clue on how to fix this?