[technical] multiple game instances warning

[quinor]

My suggestion is to add warning for launching multiple instances of Factorio from one installation/folder. It causes lots of problems, and devs said it should not be done... Crashes and unability to save game are one I've discovered, but there are probably some more. Of course, you can just not do that, but having warning popping up would be much more convinient.

[FishSandwich]

Hm, mine already throws out an error message if I try to run two instances from the same folder.

[quinor]

Mine does not, most recent version on Arch Linux x86_84. It only throws an error when I try to save the game.

[FishSandwich]

Welp just for information's sake, win64 installer version. Error pops up when attempting to launch the second instance.