Hi! Sorry to hear your sim crashed. We will do our best to help you, but in order to give you the quickest response we need to make sure a couple of items are addressed first before you post:
1) DO NOT post with "same issue here". Please create your own post
2) Addon Removal
a) remove or disable all addon scenery
b) remove all third party addon plugins you installed (including shadeX and XPRealistic) from the X-Plane plugins folder
(X-Plane 11\Resources\plug