I've just upgraded from version 6.3 to 7.7 and  it keeps crashing on me when I try to convert more than one file. For example I want to convert movie1+2+3 so I select the 3 files click convert then it just crashes. If I want to convert 1 movie it works fine, so I don't think it can be codec related. Just seems like the problem is down to me trying to convert multiple files, any ideas how I solve this ?