I know after effects is not backwards compatible and never has been. Dont suppose anybody knows a way of getting round this?
I'm sure 64 bit after effects is a boon to many users but for me the problems have been endless.
Does anybody know a fix for taking your projects back to a 32 bit version of after effects?
There is no "fix", but you can copy&paste some data with both programs, possibly requiring to adjust the headers in a text editor/ Excel. See this old tip for some basics. There was also someone working on a bunch of import/export scripts to export to a custom text file and back, but I've lost track of how far that ever went. Mabe check AEnhancers.com...