Use the menu and go to Edit>Purge>All image and desk cache
Well, I guess it was just a bug, I just pressed play again, and it disappeared.
I face another bug now, i'm doing Ctrl Z, and the settings do change, but on the preview screen it still shows the settings I wanted to replace.
Yes, it is a bug. A well known bug. AE 2015 is full of bugs. Rife with them, in fact.
Or Fusion, from BlackMagic.
How can I choose the version I want to download?
If I have full Creative-Cloud version.
I'm not entirely sure the process... try searching in these forums... Rick has posted some really good replies on how to do it, that I've seen... just don't remember where.
How to install older version
or something like that.
Like the way your question has become "unanswered"?
I didn't do it. The answer you accepted is still in the thread. Me thinks a moderator didn't like the world "buggy".