I've been using VP without problem for years and always keep the program updated. A few days ago I had a minor crash and immediately got a notification that there was a new version available with a number of fixes. (13.45) I downloaded it and found that the layout of video effects had changed to one I remember from a few versions ago, and which I didn't like. Accordingly I reverted to my previous version (13.36) and since then, it takes about an hour to create an 8minute video which is then largely corrupted. Images overlay each other, the audio track is out of sync, the picture judders and freezes. It is shocking. I've tried a number of media players all with the same results. I've even rolled-back to an even earlier version (13.27), but the results are the same. It's as if my processor cannot handle the load, yet it's never been a problem before. Any suggestions please?