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The crashes were also a major issue. However, adjusting the account settings helped. Go to the settings where you enter your account details, uncheck "synchronize saved games," and select "none" for the proxy server.
With these settings, I haven't experienced any crashes so far. This is considering that I'm in a place called Norilsk, where only satellite internet is available (I use a 3G USB modem with a speed of around 10-50 kb/s).