Thanks for your reply, this is an update to 1.5. So what I'm going to do is take your advice and just remove DCS completely and grab a fresh install of 2.5. Because I don't wanna be bug fixing and fault finding all the time.
One other question though, I have modules F16, Spitfire and Hawk I ought from the DCS website, but previous to this I was using Steam and got the Huey (which I love). But DCS is uninstalled via steam, how do I add the Huey back once I have a fresh 2.5 install?