Hi Two Bob,
Sorry, it is a PW. I've tried the 'un' thing, I did follow the description from jforner and his PW as above. i've got the same problem - Waterstones screen saver when I'd rather have other's like my on my old JB Kindle.
I was hoping they might have an idea or two on what I could try. I can follow the instructions, I think

but don't have the tech knowledge to troubleshoot it. I get to 3 and it basically fails the has it installed correctly. I don't suppose it's the 0.7 version rather than the described 0.6 affecting the 5.3.1 PW Kindle?
The root directory now contains the linkss, python and usbnet folders, but otherwise all seems as before.
Thanks for replying though. I'll keep trying.