I am on 13.1 and -at first- could not find how (specifically where) to apply the mentioned solution, I do not know whether it is the same in1 3.2 as in 13.1 (probably it is) but I had to go into the directory /MultiBit-0.5.18 (and thus NOT in the directory /Multibit) and execute the command from within that drectory, after that Multbit worked fluently and also without an open Terminal window when running.
so you'll probably have to to:
and then
Good luck!
Thank you! I managed to delete the files this way. It seems to be working since I managed to export private keys without MB crashing.