For Windows
Step 1: Go to : C:\Program Files (x86)\Common Files\Adobe\OOBE (Rename PDapp to PDapp_old)
Step 2: Go to : C:\Users\jdembla\AppData\Local\Adobe (Rename OOBE to OOBE_old)
after rename these 2 fodler download updated version of AAM from : http://www.adobe.com/support/downloads/detail.jsp?ftpID=4773
After installing AAM try to sign in it should work now.
For MAC
Step 1: Go to /Application/Utilities (Rename Adobe Application Manager to Adobe Application Manager_old)
Step 2: Click on Go (Finder Menu)-> Go to folder-> ~/Library (Which is user Library)
In User Library go to -> Application Support -> Adobe and Rename OOBE to OOBE_old
After rename the above mentioned folders download the updated version of AAM from : http://www.adobe.com/support/downloads/detail.jsp?ftpID=4774
After installing AAM try to sign in it should work now.