Can't Authorize After Install

Hi - I installed the Digital Editions for Mac and when I installed, I didn't log in with an Adobe ID and just "authorized this computer" only. Now, I would like to log in with my Adobe ID on it, but the "Authorize" and "Deauthorize" options under "Tools" are grayed out. I tried uninstalling and reinstalling, but it did not work, as it still remembered my computer and did not give me the option to log in with my Adobe ID. Thanks!