IM USEING A MAC AND RUNNING WINDOWS 7 THROUGH IT , I DOWNLOADED ADOBE AFTER EFFECTS AND TRIED TO OPEN A DOWNLOADED VIDEO BLOCK , GOT MESSAGE , THIS PROJECT MUST BE CONVERTED FROM VERSION 9.0.2 WINDOWS . THE ORIGINAL FILE WILL STAY UNCHANGED , ANY IDEAS THANKYOU DERRICK
It works as it should. This is merely a friendly warning for your own safety.
Saying (in all caps) that it doesn't open is silly. Right after that "error" message, the project opens.
Why are you yelling?
Read the message. All it says is that it was created in an old version of After Effects and is going to make you save it with a new file name so that your original project file won't get overwritten.