Yowindow does not start correctly

[US54]

OS: Windows 7 Pro SP1 64bit
Yowindow: 4 Build 98 registered Version

When doubleclicking the Yowindow icon on the desktop simply the YW icon in the taskbar appears, no window is opening. I have to stop the process "yowindow.ese *32" in the taskmanager and try to start the programm agian. After a few times it will start correctly. Changing the start behaviour with compability modes does only help for one time.

Any help would be appreciated,

U.S.