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
I've talked to Xamarin about downgrading. It's not straight-forward. You will need to uninstall everything from Add and Remove Programs and then re-install directly from the following .msi's:
JDK 1.6: http://download.xamarin.com/Installer/MonoForAndroid/jdk-6u39-windows-i586.exe
Android SDK: http://dl.google.com/android/installer_r22-windows.exe
GTK#: http://download.xamarin.com/GTKforWindows/Windows/gtk-sharp-2.12.21.msi
Xamarin Studio: http://download.xamarin.com/studio/Windows/XamarinStudio-4.0.8.msi
Xamarin.Android for Visual Studio and Xamarin Studio: http://download.xamarin.com/MonoforAndroid/Windows/mono-android-4.6.08007.msi
Xamarin.iOS for Visual Studio: http://download.xamarin.com/MonoTouchforVisualStudio/Windows/mtvs-1.1.200.0.msi
easiest way of doing is as described here
Download links Links for the recent individual installer packages can be found on https://store.xamarin.com/account/my/subscription/downloads.
In most cases, uninstalling is not even neccessary. just download the version you want to install and it will handle uninstall-install together.