Hmm, I must not have seen your post on the HS forums... But to answer your question, I believe that U360's are treated like joysticks/gamepads by Windows. Support for that has not yet been added to HyperSpin, but it is a work in progress.
You should be able to use a program such as Xpadder or Joy2Key as a work around in the mean time... Keep in mind that HyperSpin is still very much a work in progress. The primary goal was to get a working frontend out there, once the initial bugs are fixed then Bill can focus on adding additional features such as your questions.