Show us a screenshot of exactly what you're clicking to open After Effects.
Well, what system?
Thanks for ypur reply, interesting question.
I can tell you: I tried everything. The Short-cut-Icon on the Desktop, the Short-Cut-Icon in the AE-Folder and even the AfterFX.exe itself! And guess what: Even then only Render Engine opens up. Your turn.
Intel Core i7-3770 CPU @ 3,4 GHz
RAM: 16 GB
Nvidia GeForce GTX 670 - 2GB
I can only guess that there was a problem with the installation. Uninstall and then reinstall, being sure to install all components when you do so.