Thanks for your post, spotted dog.
A general word about removing Platte. The Easy PC site has a removal tool which has proven effective (we hear) for a number of people. Symantec and others also now remove Platte (see Michael Pollitt for details). If you're concerned whether there's any Platte stuff left, take a look
here (look at various posts on this Blog which deal with Platte) which may well be useful.
You imply that you haven't heard from Platte for a while. If you do hear from them or, more likely, from Oriel, do not be phased by this, and in particular, if Oriel contact you, you should respond but tell them that you are in dispute with Platte as you did not visit their sites.