I downloaded the appimage of 1.5.7 but executing it shows nothing and exits.
Operating System: Manjaro Linux
KDE Plasma Version: 5.21.4
KDE Frameworks Version: 5.81.0
Qt Version: 5.15.2
Kernel Version: 5.4.112-1-MANJARO
OS Type: 64-bit
Graphics Platform: X11
(https://i.imgur.com/Glp2VoD.png)
works great for me, Linux Mint 20.1