I hope someone else will field these questions. It's been too long for me to remember . . .

You've got the right site for downloading the driver, assuming you need one. I thought the UM-1 was plug and play with Windows XP.

I believe you may need to go to Control Panel, System, Hardware, Device Manager, to find the USB/midi interface. Then delete the USB UM-1 device and install the driver first. BUT, It's been so long that I would hope someone with better knowledge will step in.

There may be more folks at the General Arranger forum with up to date midi/PC knowledge.