AppImageLauncher works as intended.

But, if you are willing to use the terminal, then there’s appman. Appman is a terminal package manager for handling appimages, which also integrates appimages into the system. It can update appimages, as well as install images that are not found on its package database.

I can hear Iron Maiden’s ‘Man on the Edge’ music.

No. I prefer the quickest way to share my data between different computers and operating systems on my home network. I will also mention that my network is not accessible over the internet.

At least the walls are not painted green.