New feature: USB storage device selection dialog
If only one USB drive is connected and if it's already mounted, start the program and hit Enter twice to select it. If it's not mounted, hit the Mount button in the selection dialog.
The translations have not been updated (if you want to help, open an issue).
An AppImage and a pre-compiled binary (Debian 8+) is attached below. You should be able to launch either one of them on most modern Linux systems (Debian 7 is too old). It works on live systems like the Fedora install disc.