I've missed intermediate updates. Uploading 4.0.8 doesn't modify MySql database (and possibly other things)
 
Can you suggest an update route? i.e. 3.6 to 4.0 then 4.0 to 4.0.8 - but I can't find a v4.0 download!
 
(Solved - re-uploaded files and was able to upgrade db)

No acknowledgment emails are being generated.

No Emails sent! On the Admin Settings Page the SMTP tab doesn't open anything - is this right?
On the Settings/Orders/Order Profile page the 'Notification Emails' tab does not open (only General tab).
 
Image shows my Payment Systems/Final Checkout Page

Just like to say I'm all sorted with excellent and prompt support from Viart (Vera).
 
Sorted out my SMTP setting and a couple of other code inconsistencies that I had.
 
If it helps others I also had problems until I cleared my browser cache.
 
Thanks Viart