I`ve installed Xamarin (Xamarin studio, Xamarin.Android) But there are some problems with building even the simpliest project(just create new project->Build->Get an error).<
I downgraded monodroid multiple times because of issues with performance. I did not have to uninstall and re-install everything.
Control Panel > Programs and Features > Uninstall Xamarin.Android.#.#.####
Download msi http://download.xamarin.com/MonoforAndroid/Windows/mono-android-4.6.08007.msi
Install