When you have opened an Inklingo PDF the first time, you should NOT have to enter your email address and password again until it has been longer than 200 days.
A small group of quilters who are using the newest version of Adobe Reader DC have to enter their email address and password every time because of a recent update by Adobe. I am sorry for the inconvenience.
You can re-install Adobe Reader DC or install Adobe Reader XI to fix this issue.
Adobe Reader XI has no issues. You can uninstall DC and get it from
(You can skip any offer if anti-virus.)