For anyone reading this who is actually a Fire TV Stick user but, like me, came to this forum out of desperation for ANY solution to Freevee's eternal "Continue watching" queue--the above method works on Fire TV Stick as well.
You, sir, are my hero.
Here is how to clear your streaming device's Freevee “Continue Watching” queue.
It has to be done on your computer, not your streaming device.
If this doesn’t seem to be working, you may need to clear the Freevee application’s cache and data on your streaming device and/or restart the device itself. But it worked fine for me.
Doesn't work for me. I don't have Prime Video, only access FreeVee through Roku, When I ghe post et to the Prime Video: Account & Settings, it just says You don't have a subscription to Prime Video, and if I click on Hidden Videos, it says You haven't hidden any videos.
The post I did a while back does still work for Roku, but is a pain for series, because you have to 'unwatch' every episode you have previously watched ((select and click on Watch from Beginning, then Back on the Roku remote) - which takes a good while for something like Lost, with 11 seasons.
If only they would change the app to work like Netflix. On Netflix, you just scroll down to My List, select something in My List (movie or series), then scroll down to Remove from My List - and it's gone. Takes a few seconds.