Thanks, I had no idea. I don't know how to update the AppImages I use except by downloading new AppImages manually.
Re:What's new in Ubuntu 19.04
by AnIdiotOnTheNet on Thursday April 18, 2019 @09:49PM
(#19696423)
I really really wish AppImages were embraced by more of the Linux Desktop community.
It does: https://github.com/AppImage/AppImageUpdate