Yet another reason of choosing other hash function:
We have only 64bit version of the game, and in 64bit process the CPU can hold 64bits at once in a single register. So by choosing other 64bit hash function you will still be able to compare hash values like numbers (not arrays).

Unfortunately, neither of us can see any file which contains "desync" in its name in the folder

Edit: and installation directory.

Also, I forgot to mention: we didn't use any mods.

After two guys had tried to test the armor shield by hitting each other with a long train (with rocket fuel), desync happened and the game (world) has stopped responding, although I still could open the menu (ESC key).
After choosing "Quit game" menu option, the game crashed.

Number of locomotives ...

I'm sorry for being a bit `offtopc`, but I cannot PM @Twinsen, so I'll write here:
Please consider removing the PDB, in my opinion it shouldn't be publicly & easily available. Tho it won't harm the multiplayer much, but anyway...
https://thumbnail.myheritageimages.com/744/401/26744401/000/000074 ...