Xaart
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I don't even know. Unless you had more than one version of the game installed in different folders? The file names of the standard maps are all in English, even for the Russian versions. Maybe that's why?
Most likely, that's the issue. Marmot, thank you, I thought the game recognized the map by its name. I'll have to search and remove them one by one.
Added 2 minutes later
Mr. Marmot already suggested: "The file names of the standard maps are all in English, even for the Russian versions. Maybe that's why?". I'll just add that since the game takes the name from the map itself and not from the file name, you will see them in Russian.
Yes, that's it. Thank you, guys.
Now I understand why changing the file name didn't affect the map in the game. Some of them still have those strange characters.