0118 hex and fpga worked absolutely fine for me. There is a later update that didn’t go so well. I did not post the files here but I linked to the forum post on the miniDSO I think…
Firmware Update — FPGA_2 .22-SYS. V1.2-APP.V2.1, this one went pear shaped for me!
You say opto? I have only seen this listed as “opt”. It’s most likely short for optional.
I got this working… If you save the waveform as a DAT file and then load it back selecting File_1 superimposes the Channel A waveform from the saved file… File_2 Channel B and so on… I uploaded file templates on page 2, about halfway down which need to be loaded onto your quad…