There is thread for the same issue on official forums:
http://eqiiforums.station.sony.com/e...201305#M201305
I posted there in more details. But what I found to work for me was to use eq2interface.ini file I had backed up before patch of 29th January.
Newer backup (from 28th Jan. before LU31) even though was working just fine in time I copied it is now causing crashes.