I installed the package on Visual Studio Emulator for Android by dragging it back. Yesterday I received a new update. The emulator doesn't seem to support drag-and-drop anymore. Can anyone shed some light on this?
This can happen if you use an emulator with higher resolutions. Try again without promotion (not as Administrator).
The emulator probably cannot connect to ADB. See this document: https://msdn.microsoft.com/en-us/library/mt228282.aspx#DragAndDrop to make sure that ADB can connect to the emulator.