About the crashing issue, please give this version a try and feedback, thank you.
Mona
This version crashed for me the same as the original 5.0.3.8 - I noticed that the downloading page had a "720p" label during processing, and about half way thru the "EAC3" label appeared, shortly after that it crashed. On another computer with version 5.0.3.3 downloads fine from Disney+.
So, I guess when new versions come out, instead of doing the update from the app, download the offline version from this forum and save in case I need to rollback, or just don't update unless I am experiencing an issue that is addressed in the udpate or need a new feature.