Needed driver doesn't have a security certificate. Maybe

The old 201 kits should be recalled for improper manual instructions.

Well, talk to OSEPP. They're not an official Arduino distributor, and the board you're talking about is not actually an "Arduino." It's more-or-less a clone of the Arduino board that came before the Arduino Uno (The Duemilanove), so you'd probably have better luck using an OS and IDE version from the same timeframe (~2010.) (although, getting it to work with the current IDE and current OSes is a much better "non-lucky" solution.)
(Hmm. It looks like they have a newer "Uno R4+" that is closer to an actual Uno in design.)