error that I reached my limit of number of machines reached for id....the reason is that I AM HAVING HORRENDOUS PROBLEMS TRYING TO READ BOOKS ON MY KOBO THAT ADE is unable to open. So now ade is basically useless for me as there is nowhere that gives

i  am getting the message that I have reached the maximum number of machines I can use for downloads...I have been trying for days to authorize my kobo...one machine only...but now its useless as ade is not opening my library books on the kobo...the forums say authorize and unauthorize to troubleshoot. That caused me to exceed the number ofauthorizations. no help anywhere for this