Hi, vinceASPECT.
AppImages generally work quite well in 64-bit TCL after running these commands:
$ sudo ln -s /usr/local/etc/fonts /etc/fonts
$ sudo ln -s /usr/local/etc/ssl /etc/ssl
$ sudo ln -s /lib /lib64
$ tce-load -wi bash
It seems this particular AppImage also needs pkexec which is part of the polkit.tcz extension, so you also need this:
$ tce-load -wi polkit