Your problem is you have several models which are invalid. Specifically "Angelo Fibre T Bright" and "Apex FC" which are both custom models with no nodes defined.
Actually it is worse than that ... I just ran check sequence you have 39 serious errors in your setup. You need to fix these. It is a miracle any version works with your setup.
There are 39 of these that need to be fixed. v51 will fix the crash but that wont solve your problem and your models still wont have any pixels on them.