Try your luck with those files:

- Poser UI Prefs_1920x1080.xml <-- replace 1980x1080 by your screen definition

- Poser UI PrefMap.xml
- AddonPrefs.json
- LibraryState.xml
- LibraryPrefs.xml

I frankly doubt that both Library...xml have any influence in the crash you're experimenting, I would first check the first one: it contains where each window/toolbox is and its floating state. When this file is lost, Poser reverts to its default UI. and when the UI is correctly set, it's a good idea to keep a copy.

I am using Poser with Windows, so that I ignore where the Mac is keeping them, probably somewhere in the library, applications data (if I remember correctly, when the Option key to push when the Finder is opened, this adds/replace a location in the "Go to..." menu entry (my Mac is in French so that it's something like that)

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