hUb has just been released in version 1.23. The most notable change is improvements to the categories both in user interaction and meaning. You can now click the labels of the categories as well as the check box itself. Games can now reside in multiple categories making it easier for you to find a game of your choice. Finally double clicking a category will either exclusively select the category or exclusively deselected it.
Other notable improvements are increased performance on server lookups and correct scrollbar height when not all games are shown.
This update is automatically applied when you start hUb.
Finally we have a question for you:
Should hUb remember your category selection when it closes? Answer here