By admin 
AppImages are designed to be simple. Download one, make it executable and run it. On Ubuntu, though, there’s an extra step: Ubuntu ships FUSE 3 by default, but some AppImages still need FUSE 2 (libfuse2t64) to run.
AppManager is a new(ish) GTK4/Libadwaita app which fixes that particular annoyance by mounting AppImages through uruntime instead of FUSE. It handles the usual SquashFS-packed AppImages, plus the newer DwarFS-packed ones too.
Double-click an .AppImage file and AppManager opens a macOS-style install flow. Drag the app icon to the folder and AppManager moves the file to ~/Applications, or a directory you choose, and creates the app launcher and shortcut for you.
If you have a bunch AppImages on your device already and want to move and integrate them via this app, use the import option and point it at each AppImage or a folder full of them.
Setting launch options, icons and paths per app
This is an AppImage manager, so it does more than just offer a macOS-style way to create launcher shortcuts.
It can check for and update AppImages using Gitlab or Github links; you can set command-line arguments and opt to use ‘portable’ home and config folders on a per-app or global basis. You can also set $PATH or environment variables.
Customisation also extends to app icons, if you don’t like the look of the provided one, and you can edit launcher keywords for apps to help find it in app menus and launchers, including GNOME Shell’s app grid.
For a speed boost, albeit at the expense of disk space, there’s an ‘extract’ option in each app’s listing. Uncompressing the package contents can, on slower systems, result in heavier software opening a little faster – this can’t be easily undone, though.
Updates can be set to run on a schedule and download zsync delta patches rather than the entire AppImage (where supported). For those who prefer the terminal, there’s a bundled CLI for installing and updating apps too.
Download and install AppManager
I’ve previously spotlighted apps, like Gear Lever, which do similar things. Unlike those, AppManager doesn’t depend on FUSE. That cuts out needing to remember what package to install before you can run AppImages on Ubuntu.
AppManager is open source and, naturally, provided as an AppImage itself. The developer, Arnis K, says it runs on almost any desktop Linux distribution. It worked fine for me on Ubuntu.
Download it from the project’s GitHub releases page, give it executable permissions and then double-click to open. Drag the icon to the folder as shown, and then configure in the main window.