FWIW:

i had the "lost settings" problems from hell at first.  i tried older
srm's (down to version 3.8) and then tried 5.5 again.  since then i've
not had *any* problems with my SRM and i've hacked on my pc164 quite
a lot and rebooted it and power cycled it many times.  (hm, only at
kernel #37).  it has been months since i put 5.5 back...