Also, to further Josh's point; we don't even necessarily know what portion of the model would require reworking. There are SO many textures, materials, and surfaces in the file and there's no guarantee that a redone model wouldn't have the same problem. We will not be redoing the model to attempt to fix a problem we have a workaround for in the knowledgebase.
Edit: This KB article https://tfdidesign.com/index.php/knowledgebase/44/Simulator-Crashing-When-Changing-Views.html and this forum topic https://forums.tfdidesign.com/index.php?/topic/3754-view-switch-crash/ both describe workarounds. If you haven't completed a full flight in a year, it's because you haven't looked at the solutions we've provided.