I get exactly the same problem. The customer support staff was really not helpful at all.
Did you ever resolve the problem as I am having the exact same issue.
Do you used Windows or Macintosh?
Eureka! I finally did it and everything is running smoothly. I did the following;
1. Uninstalled 4.5 ADE
2. Installed the older version of 3.0 ADE
3. Then brought up the screen showing authorization information. Then pressed Ctrl, Shift (or arrow up key), and D and that completed the de-authorization. This method only works on the older version.
4. Then I uninstalled the 3.0 version and added the 4.5 version back on. This time when I authorized it, I wrote down my I.D. and password, lest I forget.
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You can do this without having to reinstall ADE or change versions.
You need to delete out a few registry keys to clear the activation for ADE. You must have administration authority.
On Windows it can be found here:
Open Windows Registry by using the command prompt and typing 'regedit' or by opening the start menu and searching for 'regedit'.
Search for the following folder:
The 'Activation' folder can be entirely deleted.
Restart ADE and it should be deactivated at this point.
Thank you. I will keep that info for future use. I was able to fix it in my convoluted way, but it took far too much time.