Hello,
yesterday was released version 15.0.1 . But back to your problem . Management console uses engine from Internet Explorer by default on windows. There are two things you can try:
1. Delete IE cache and try it
2. If step 1 didn't help: run Serv-U tray application, right click its icon and check "Use system browser". Try to start MC now. It should open in windows default browser.
Miro