Hi Robbie,
Thanks for that info, very helpful, and enabled me to fix the bug in GPlates.
Turned out the default values were not getting properly initialised (due to a bug introduced just before GPlates 2.2) and so they all became zero.
In your case, when you removed your non-default settings (~/.config/GPlates/GPlates.conf), you got a zero value for the default time increment. And hence the crash. When you then changed it to 1.0 in the user preferences, that set the value in a new ~/.config/GPlates/GPlates.conf, preventing further crashes.
I’ve uploaded a fix in the source code link you used (the link mentioned in this post). It’s the same download link but with updated source code. The only changed files are src/app-logic/UserPreferences.cc and src/app-logic/UserPreferences.h (so you can just replace those two files for a quicker build).
Regards,
John