I tried the method of saving the game in Port (after the Tutorial), without any Mods installed. I then quit the game, installed MMM and loaded the saved game again. It worked until I got to the last Port on Kiel canal and then CTD. I have given up on SH5 for now. I will return in another 6 months. Good luck and thanks for all your work
By the way, none of the warships at dock in Kiel (Graf Zeppelin aircraft carrier etc) that were in previous versions off MMM, were present for me in v0.5. Did you remove them, or is something really wrong with my installation?