A few people have posted the same problem. Easystudio has frozen a couple of times with me also (I've got the e700). I just close the program and open it 'til it works, if that wont work you could also try restarting you PC. Make sure that your phone is talking to your PC BEFORE you open Easystudio. Also click the live update button (in help) to make sure you have the latest version of Easystudio.
Hope this helps.
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