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Please see the official X‑Plane Support page for help.
I'm not with Laminar Research, just a fellow simmer in the UK, but it may be worth you uploading your X-Plane 11 Log.txt file to this post, so that I and others with a broader knowledge base can review it and assess what may be causing your copy of XP11 to crash?
If you're not sure how to upload your Log.txt file to this Q&A post, please click on the following link to view the instructional PowerPoint slides I have prepared for this purpose:- http://questions.x-plane.com/?qa=blob&qa_blobid=15317911955272318443
This site is no longer being actively maintained.