Steam workshop removed(updated) mod: how to continue a savegame?

[Aethyr]

I have a savegame with an mod that has been removed from the workshop (the easier polder mod, that is not longer useful now that we have an official patch for polders). I hope this is the right section of the forum, I haven't find anything about steam

The game autoupdated when I logged in, and now I can no longer play my savegame as I am missing that mod.
Can I do something for this particular game? Like adding an almost empty mod folder just to pretend that I have the easier polder mod
Can I stop steam from autouploading stuff?

I have tried to recover the seed of the game in order to play it again from the beginning (that's not the best solution, I know, but it is something...) but it seems that if you change the active mods then you cannot recover your game in this way. Or maybe I pushed restart the first time, so the starting position is not longer the same... I do not know how (if?) the restart button affect the seed.

edit: actually, I have no idea about how to recover the seed from a game that cannot be loaded into hotseat screen (as it cannot be loaded at all)...

Any suggestion is appreciated!

 

[Infixo]

Empty mod should work. But you need ID of that mod and then create .modinfo. No other files are necessary.

 

[Aethyr]

Empty mod should work. But you need ID of that mod and then create .modinfo. No other files are necessary.

How do I discover the ID of a removed mod?