Have you tried the advice, for crash on project load symptoms, given in the knowledge base?
Even that aside, the reset functions it points the way to are a good first thing to try when facing a systematic crash. I would go in the order of Dropbox cache (if applicable), custom fonts and lastly default formatting. Presets could maybe be involved, but most people will not have actually customised those since that was only something that could be done with the old Mac version from years ago, before styles were introduced.