1. How to check ROM version ?

You push "C","0","ENTER" then,
Display "83" : ROM version is 2.4 or 2.2
Display "84" : ROM version is 2.4
Display "85" : ROM version is 2.5

I think, If your Memorymoog is not Memorymoog Plus or does not have Sequencer / MIDI Board then display number is not same above.

2. How to reset program security code ?

Memorymoog patch program have security code function. The user can change this security code.
So, some time, the secondhands user cannot write own patches to the memory because last user change the code.
The command to reset the code to "0000" without opening memorymoog is Press the PREFIX A, LFO destination to OSC1 FREQ, and OSC3 sawtooth buttons together.