i was using a twitch integration that was calling itself amazon (i think because there was no twitch in galaxy at the time), and now that i've updated it to where it calls itself twitch i have all those games showing up for both the twitch and amazon platforms. the amazon integration is no longer there (it's been replaced by the twitch one) -- is there a way to delete the amazon platform games so they don't show up anymore? i see i can hide each one individually, but it want them fully gone not just hidden, and i'd prefer not to have to do each game individually.

I had the same problem. You need to remove the integration inside the launcher before deleting the folder. I got the integration folder back from the trash bin, restarted the launcher, removed it, then deleted it again.
Don't know what to do if you can't restore the folder though.