You have to do a factory reset to get a link code. If you have access to the menu:
settings> system> advanced system settings> factory reset
The only time you need a link code is when you first link a new (or factory reset) Roku to your Roku account. What is telling you that you need a link code? To unsubscribe from a channel go to https://my.roku.com/account/subscriptions . It will ask you to log in, but no link code is required (or useful).
Not true!! To view courses I have purchased from Great Courses on my Roku TV I have to use the link code. I do not have it as nowhere was I warned that I would need it for other things after setting up my tv so I deleted the email once I set up my tv.
cspears, you have to contact Great Courses. Your problem has nothing to do with the link code that Roku used to use to link a device to a Roku account. Roku abandoned link codes a long time ago for device-to-Roku-account linking. Individual channels/apps may use them, but that has nothing to do with Roku.
