Disappearance of the Muramasa mod and other

Hello everyone,

The Muramasa mod (cm) is gone. I was playing exclusively with this mod. The game has no interest anymore if Steam removes mods without warning. So why is it gone? Who is its programmer?
How can I secure my game folder so that this doesn’t happen again?
I would still like to know why all these mods disappeared (cm, char_dwarf, cleric_ranger). They don’t come from the same programmers after all!

Thank you for reading and helping in advance.

They don’t come from the same programmers after all!

They do

Thanks a lot. And I’m not a bot spam, and not GPT even less ^^.