HELP HELP HELP

Hi
I've been using divx for years now and was watching a video when it stopped loading so I refreshed and all of a sudden an error message appeared on my screen saying "The downloaded video is not a divx file" This has happened before and all I had to do was go to another site to load the same video, but now every site is saying this.
I've updated my divx from version 6 to divx plus and now nothing loads at all now. Version 6 has always been the best for me as my files save as part files and divx doesnt play those.
If someone could help me i would really appreciate it because divx is a goos product with good quality and this is a serious problem.
thank you