Well thanks to a total lack of any interest in my device makers and DisplayLink I spent some time working through the problem. I found in Firefox the download wasn't seen as a exe and there after windows sees it as data to be run in something.
Change to IE and its down loaded as a exe file and runs. The problem is either in Firefox or the debug program causing this. The companies support had not bothered to check any of this out which doesn't impress me at all!
