Where does PSE8 save the serial number?

Question

I have three iMacs at home, but I only use two of them since the first one is broken. I had PSE8 installed on the iMacs, and during the summer bought CS5. Since I didn't need to use PSE8 on this iMac, I deinstalled it by dragging it to the trash can. Then about a month ago I purchased another new iMac, and installed PSE8 on it.
When I try to use PSE8 on the newest iMac a dialog box appears on the screen indicating that I have to either buy a new serial number, or deactivate PSE8 in one of the three iMacs, because I already have the serial number in three computers. My question is as follows:
Where in my iMac (the one I use with CS5) can I find the PSE8 serial number so I can drag it to the trash? I looked in the Library/Preferences folder and noticed that there are still a few PSE8 files left behind, but have no idea which one contains the serial number. Any ideas?
Thanks in advance.

Answer 1

I apologize for posting on the wrong forum.
The problem with the activation/deactivation of PSE8 was solved, but first I will explain in detail what the problem was since all Adobe applications go through the same process (serial number activation/deactivation).
ORIGINAL PROBLEM: I had installed PSE8 twice and then deinstalled it at later dates. However, deinstalling an Adobe application does not deactivate the serial number (this number is left behind somewhere in the system along a few other files). So, I installed CS5 on this iMac a few months ago, and got rid of PSE8. Then a few weeks ago I bought another iMac and installed PSE8 on it, and here is where the problem began. When launching PSE8 on this iMac, a window would appear on the screen indicating that I already had the same serial number installed in two other computers, and that therefore I had 30 days to solve the problem.
SOLUTION:
a. Reinstalled PSE8 on the older iMac, launched it, and then chose "Deactivate" from the Help Menu and proceeded to deactivate PSE8
b. Then I "deinstalled" PSE8 from this iMac, since I don't need it (I have CS5 on it)
c. Launched PSE8 in the new iMac, and chose "Activate Serial Number" on the window mentioned in the last sentence of the "Original Problem" above, and this time it accepted the serial number because it could not find it in the older iMac that was still on my home network
I hope that this could be of help to others.