Customer #343855 on DEV-11306 - FEZ Hydra Basic Kit

So just recieved my Hydra but had a heck of a time loading the latest firmware version 4.2.4. (jumperwire across pins 8 and 10 on socket 3 etc.) After downloading all relevant SDKs and drivers decided to download a very simple 2010 VS c sharp project but get the following error… Error 1 Cannot deploy the base assembly ‘mscorlib’, or any of his satellite assemblies, to device – USB:Gadgeteer twice. Assembly ‘mscorlib’ on the device has version 4.2.0.0, while the program is trying to deploy version 4.1.2821.0
Anybody experience the same?