After upgrading my tablet to Windows RT 8.1, I suddenly lost ability to run my ARM Remote debugger. Attempting to launch it was giving me a message complaining that Windows cannot verify the digital signature for this file.
So I installed VS 2013 remote debugger, which did not work with my VS 2012 on the dev box. After feverishly searching the web for the solution, I found a site to download Remote Tools for Visual Studio 2012 Update 4. Wish I knew this before upgrading.