but since I've got some troubles with the beta version (hang on "Loading visuals ..."),

This is a serious problem that needs to be fixed. Forget 1.03, there's something bigger that's going wrong. Assuming that the version you're running is 2.0 beta 13, Your player should not hang on "Loading Visuals".

Have you gone through each and every bullet point here to make sure you've done everything right with regard to the beta13 software installation?