To update my previous comment, after I spoke with an Apple rep for an hour, and I went back to my tv, none of my apps would launch. Frustrated would not even describe how I felt. So, at this point, I did a 'factory' reset' Oddly, the apple rep never told me to do this. I went to 'settings', then 'system', then 'Advanced system settings', and then clicked on 'factory reset', and yes, you will need to go thru the steps like your roku is new, but guess what,
IT WORKED!!!!!!!!!!!! I can now watch Apple tv and anything else on the Roku, menu.
Really shocked, however, that nowhere online, did it tell me to do this.
And, the Apple guy, did not even tell me to do this.