I can`t export a .swf file from AE. What do i have to install? Would it solve the problem, when i install Animate / or Flashplayer? Thank you for your help.
No. Those features have long been removed from AE and there's no way to get them back. Instead import whatever you want to turn into an SWF into Flash/ Animate, which by all rights could be an image sequence or clip from AE.
Thank you for the bad news :-/
So i will do it with the Animate.