Do I have to format it? It's a fucking pain

And for the hassle it ain't worth sending the dongle back. Had it since November or whenever it was but not really used it as I didn't like the HID/software it came with... And it's from fooking China or Hong Kong or somewhere so it'd cost too much, might aswell buy a new one... But which one!

And do I have to format? Other than this it's (the PC) absolutely fine!