@KLineberry
To expand on what FredH and Chameleon have said...
The DVDFAB DRM Removal for Apple (iOS/iTunes), which was located under Launch Pad in the DVDFAB app, had been discontinued a long time ago. The old discussion section of the form had also been hidden, but you can still find it if you search for old posts ( https://forum.dvdfab.cn/forum/dvdfab-english/dvdfab-drm-removal ). And at one point the product info/purchase page had a big red note saying discontinued/don't purchase and it was later hidden also.
It was discontinued because it couldn't remove DRM from videos that required iTunes versions newer than iTunes v12.9.0.167, which was becoming more and more common and FAB wasn't able to fix it (they couldn't break the newer DRM)
Those who had previously purchased it, should still be able to install and use it in DVDFAB. Of course the iTunes v12.9.0.167 limit still applies for movies. When it comes to Music, it still works for me, even with newer iTunes versions installed. If you did NOT purchase it before it was discontinued, it should not show in DVDFAB.
Yes, StreamFab does have an AppleTV+ downloader, BUT AppleTV+ web site is different than iTunes. AppleTV+ web site only has the AppleTV+ movies and shows. It does not have your iTunes PURCHAED movies and shows. And yes, the AppleTV+ app on Roku, FireTV, Android TV, etc. does show your purchases, including your iTunes movies/shows, but the AppleTV+ web site, which Streamfab accesses, does NOT.
The alternative:
If MoviesAnywhere is available in your geography, create an account, link it with Amazon Prime, and download the movies using StreamFab's Amazon module. You'll get better quality than iTunes and DRM remover ever gave.
That being said, MoviesAnywhere isn't available everywhere, and there are some major studios like Paramount, MGM, Lionsgate, and smaller studios, that don't participate in MoviesAnywhere, so their movies won't transfer to Amazon Prime Video. Also TV Shows are not supported this way, so they won't show in Amazon either.
Going forward, instead of purchasing via iTunes, hope its MoviesAnywhere and download using StreamFab's Amazon downloader. Like when purchasing movies, I check for the title in Vudu, since they have clear indications of MA and the studio, or the MoviesAnywhere app. If it's not an MA eligible title, I buy in Amazon so I can download with StreamFab. If it is MA eligible, I buy wherever it's cheapest.
I do also understand that non-movies anywhere tiles on DISC that come with Digital code do not allow redeeming the digital code in Amazon (for example, in the USA, they have option to redeem in iTunes or Vudu. In that case, you are out of luck.
See also https://forum.dvdfab.cn/forum/software-support-english/youtube-to-mp3-youtube-video-downloader/419307-appletv-itunes-library-question