I installed the new firmware and seems to be saving now.
However on the initial installation of the FW all the default curve settings are at zero. On the previous FW you added a function for the initial custom curves being preset at certain values.
For some reason MD crashed with one pad stuck in an unbreakable loop and most of the settings corrupted and the settings wouldn't progress past hihat pedal section.
I erased the fw and reloaded....then reset to original factory settings. I noticed at this point that the custom curve settings were stored correctly.
I can only assume that the initial fw upgrade didn't transmit properly..even though it seemed to work ok for about 12hrs!