Thank you for reporting this issue and our apologies for the frustration.
If possible, would you please try installing the latest After Effects (Beta) build and let us know if that will launch without crashing? It is difficult to determine a cause without any logs or a crash report, but the Beta has a new Safe Mode that may help us to diagnose what is going wrong.
Thanks for reporting this issue and for any further information you can provide,
- John, After Effects E