I have Windows RT tablet with 8.1 update. I'm trying to build both 8.0 and 8.1 versions of my app. I have no problem deploy my app from Visual Studio 2013 (windows 8.1 version) onto the device. But when I try to deploy the app from Visual Studio 2012 (windows 8.0 version), it says:
Unable to connect to the Microsoft Visual Studio Remote Debugging Monitor named 'tablet:4018'. The remote debugger is not an acceptable version.
Remote Tools 2012 refuse to run on the 8.1 tablet, it says the .dll signature are not compatible, or so.
You have to install the 2012 Remote Debugger Tools on the tablet. Afterwards, you can install the 2013 version side by side as well.