I know this is an old thread, just have something to add. Curious about what the issues people are having are? I mean I'm not having any issues running two eve clients as once (not making any changes to the directory or anything, besides the fact i'm running two instances of it at once, everything is the EXACT same as it normally would be) and I'm just alt-tabbing back and forth between the two windows. No issues at all (besides the cost which can get annoying :P)