Installing a second EZ Keys product [Solved]

I am confused. In the recent sales I bought EZ Keys Classic Electrics and Electric Grand and have only just got chance to install them.
 
I did Classic Electrics first, grabbing the 1.2.0 player and sound and midi library updates. This installed and it works fine.
 
The Electric Grand seems to have the identical engine file 1.2.0 plus its own sound and midi library updates. If I try to run the sound update TT270_EZKeys_Electric Grand_UP I get a message "The product relative to this update cannot be found" I tried reinstalling 1.2.0 using the file that was associated with Electric Grand in my account but get identical results.
 
Any Ideas?
 
Doh - had to install the 1.0.0 version of Electric Grand first. I think I did not have to do this with Classic Electrics as I happened to have the Demo installed previously.