Try renaming the savegame file. I had to rename yours for exactly that reason.
Your filename: "-=Kotninja=- Косумель. Косумель shore 23-е Января 1753г"
Renamed to work on my game: "-=Kotninja=- Cozumel. Cozumel shore April 23rd 1753"
I don't know much Russian so I picked a random month name. The important thing is, my version of the game doesn't read Russian filenames so the whole name had to be translated into English - it doesn't matter if the month name is wrong, only that it's in English. While set to Russian language, my game on a non-Russian PC uses odd ASCII characters to represent Russian, which your Russian PC doesn't like in a filename.
Going in the opposite direction then:
My filename: "-=Kotninja=- Îòêðûòîå Ìîðå 27-å ßíâàðÿ 1753ã. 1"
Try renaming it to: "-=Kotninja=- открыть море 27-е Января 1753г"
The messages about "seadogs.c" are common, I get those a lot as well. They seem harmless - the game saves anyway and does not crash, the saves are not corrupt and can be read later.
There might be a problem with the officers, which is why I suggested you try using different officers and see if any of them are more likely to cause the crash. In any case, I was able to load your save (after renaming it), and the Russian names did not cause problems with assigning the officers to prize ships.
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