My Xbox controller does not work with Jazz 2+. It might with Jazz one with timed input set to false but I haven't tested it yet. In Jazz 2+, the game does not detect the controller at all and I can't map any buttons.

I can always use the keyboard but it can get tiring on my fingers in this particular game, a little like Rockman Legacy Collection, AVGN Adventures and Super Meat Boy.

What do I do?

EDIT: Never mind. I just set the older programs setting in Devices and Printers.

Just for reference, what do you mean when you talk about an older programs setting? Where can you find it and what does it do?

As a general rule of thumb, if it was released before 2006, Xinput didn't really exist.