Hi!
Have started to play around with the linux appimage and it looks good!
Had to add the following udev rule to enable the remote in the app though.
SUBSYSTEM=="hidraw", ATTRS{idVendor}=="20a0", ATTRS{idProduct}=="0008", MODE="0666"
Added the above line to a file named /etc/udev/rules.d/99-flirc.rules and reloaded the rules with
udevadm control --reload-rules && udevadm trigger
as root. Now the remote shows up as "connected" in the app.