Use ctrl-shift-D to ADE while in library view. (cmd-shift-D if on a Mac). Respond to the prompts.
Then restart ADE, and try again to authorize with your full Adobe ID.
Unfortunately, the ADE designers appear not to have any idea about usability.
If it was properly designed it wouldn't be necessary at all,
and if it was designed to minimum of good practice it would be easily discoverable rather than carefully hidden.