I am trying to help a friend who runs his business using an application written (by someone no longer available)under A4v1.1b. He just got a new PC with XP, so I had him upgrade to V7 so his data wouldn't get corrupted. However, it seems that his application no longer runs when v7 is used. The filenames were .AP4 and are now .APP and I've read that some filenames have changed. Unfortunately, there is no upgrade information supplied with the product. There was no backup function in 1.1.b either. Can anyone tell me what needs to be done to get the application working again? Any help is appreciated.