The manual is DECIDEDLY NOT identical, Panko!
You are right that you have now 3.15. Pls. look in your folder and you will see a new manual (unless you replaced the new with the old).
The best is to use the installer and install 3.15 in a new location or under a diff. name.
On page 1 of the manual it says: "What's New in SR1?"
BTW: Thanks for the encouraging words. I'll be glad to give you a refund.
Laslo