Hi Neil, I am not a technical person, but is this happening on all three of your computers?
Did you remove/uninstall the old program before reinstalling? This thread had some info on what to get rid of first:
https://www.mobileread.com/forums/sho...ing+left+panel
Has the line separating the left panel and the library list/order screen been moved so you can't view the left panel? Of course this doesn't explain why you can't order. How did you get to the store if you can't see the left panel? I assume the link there shows you have the program installed and not trying to order directly thru your browser (of course you can't order from there).
Hopefully someone more experienced with these problems will come along and you can order your book!
Goldilocks