Lightroom Classic keeps crashing in Develop module

Hello!

Lightroom Classic (v.14.3.1) keeps crashing in the develop module, most notably after I've copied settings.

Sometimes it even crashes the whole computer.

I'm working on an ancient Intel Mac (OS Ventura 13.7.6).

I've tried resetting the settings.

I've tried turning off the GPU (and adjusting a few other things, too)

I've disable a plug-in.

I've reinstalled the app (via Creative Cloud, "keeping" the preferences, so not a clean reinstall).

I even ran a diagnostic on my computer and it said "no issues found"

Basically, when I go to copy settings, I notice the temperature spike and the fan go into high gear, before the app quits (no crash report) or the whole computer crashes.

I understand that my computer is old, but I was editing without this issue, as recently as a couple of weeks ago. 

Is there anything else that I can do?

Should I try a clean reinstall?

If so, what will I lose in the clean reinstall?  Just presets and preferences?

Any advice or assistance is appreciated.

Thank you.