I'm encountering an issue when I try to start my Windows Phone Silverlight 8.1 application after I updated my visual studio.
Updating to Windows 10 broke my Visual Studio Express 2013's Windows Phone 8.1 emulators so I figured I'd install the Visual Studio 2015 Community edition. I also uninstalled all of the Windows Phone SDK's and emulators, figuring I'd start with a clean install.
Now I'm using Visual Studio 2015 and the result of this is that I don't have a single emulator that I can use to debug my Windows Phone application anymore. I've installed the Windows Phone 8.1 Emulators, Windows Phone SDK 8.0 and a Windows 10 emulator.
When I press the start button's (the one with the green arrow) dropdown box I only get the start option where the names of the various emulators used to be. When I press the start button I get the exception you can see below.
I have tried to include as much relevant information as possible. But I will be happy to provide more if required.
The answer that solved the problem was posted in the comments, so I'm reposting it here for completeness sake.
Uninstalling everything Windows Phone & Visual Studio related and installing it again fixed the issue.