My files have started playing upside down in Nerovision 6

Hi Everyone,

I recently downloaded a file which contained four-back-to-back episodes of a classic tv series. I then used virtual dub to try and seperate these episodes. On both occassions VirtualDub crashed. I then tried to play the file in Nerovision and after that all my files now play upside down in Nerovision.

I just wondered if someone can please give me any advice on how to rectify this.