Have bought P.E.10; how convert my trial version to full version?

Question

Have bought Photoshop Elements 10.  Had trouble installing it.  Forum advised downloading trial version, then converting that.  Have downloaded trial version successfully.  But how do I now convert to Full Version without buying what I've already bought (I have a disk, a serial number, the whole package)? Many, many thanks if someone can answer this!!

Answer 1

Dear Gautham K., et. al,
Ah, I was somehow doing both the trial version and the disk version at the same time.  I entered that long serial number at one point.  And I'm not getting a countdown of days left when I open my Photoshop Elements.  So it looks like I might have inadvertently installed the full version--yay! (will know for certain when the 30 days are up if my Adobe doesn't go kaput).  In this case, I feel like a dunce.  But I'm a grateful dunce and thank you, thank you, thank you for this information!!  Can't tell you how much people like me deeply appreciate such help.  There's a special place in Heaven, etc…. 
RSA12
P.S. BTW, others installing a purchased Photoshop Elements on a new Mac Lion might note that they have to go through steps to get a Photoshop Elements Installer FIRST or the software won't load.  None of the Adobe instructions told me that and that's partially how I stumbled into a kind of shaky limbo.