The computer you want to use Adobe DC on via use of a license you already had will now work using the license tied to your computer. Many downloads like Adobe Acrobat X Pro V10. Once you've broken that link though you're all set. Just log into your Adobe account and choose Plans from the navigation menu at the top. Also if you did try subscribing to the trial you'll be able to cancel that too by going to Manage Plan and selecting Cancel Your Plan. This breaks the link between Adobe DC and the computer you removed. Im using Adobe Reader 7.0 and when I try to change the Login Name (Edit / Preferences / Identity / Login Name), I cant because its greyed out. Click on that option and select to remove the device shown. Where you see 'Adobe Acrobat Pro' you'll see an option to show your Activated Devices. If this is the first time you are logging in, choose Reset your password to create a new password.

Once you log in there with the account you did not mean to use you'll see Your Plans. The one and only way to log out of Adobe DC Pro when you have signed in with the wrong account or it's forcing you to try the trial when all you want to do is sign in using a license you already have access to is to go to Adobe Account ( ).

Adobe acrobat pro log in