After using Locusmaps for tracks recording three times today - each time for about an hour - I think I can say that it is stable again. At least it has not crashed any of those three times, and before I made the above changes to my phone settings, it crashed each and every time I tried to use it.
This just to let others know that there is something that at least resembles a solution.
This just to let others know that there is something that at least resembles a solution.