But now many of my green-screen videos won't load because it says the source compression type is not supported. I made these in a fairly old version of Premiere (CC6) using QuickTime Animation, 32-bit to get the transparency.
Is there any workaround that will let me use these files? If not, how should I be exporting from within Premiere so that this new version of AE will accept them? I do have a CC license, so I have the new version of Premiere, but I've always found the more recent versions to be a bit confusing when it comes to exporting, so that's why I've stayed with CC 6.
I did the same -- I realized that there was an option to download previous versions, and I found that everything worked with 17. (I'm only an occasional hobbyist user of AE and Premiere, so I'm often befuddled by the updates)