Hi James
I deleted the software yesterday and removed them from the "network" list. I've double checked and don't find any traces of this software anywhere. Nothing starts on login except for Dropbox (and I've even tried switching it off, along with the airport wifi connection). I'm afraid the result is still the same...
Is the UNO faulty, perhaps? I don't have access to another computer at this time but I guess that is the next thing I'd need to test.
As always, I appreciate your help so far and welcome any new suggestions!