The latest OS for the M is 4.1
http://thepeacetreaty.org/organellem/images/OGM-v4.1.img.zip
There is also a beta image for the M which updates PD to 0.51
http://thepeacetreaty.org/organellem/images/image_2021-06-18-organellem-lite.zip
These links come from the following discussions on here:
Looking forward to playing with your creations