Probably the best USB-creator, but available only from MX/antiX repos.
At first must download and install the next packages:
live-usb-cli-antix_0.3.2_all.deb
live-usb-maker-gui_0.2.4_all.deb
Check that all necessary packages are installed:
sudo apt install cli-shell-utils extlinux syslinux-common parted wamerican dict live-usb-cli-antix live-usb-maker yad udev udisks2
If everything is ok, live-usb-maker should find from System tools. For running that program, root account must be activated (sudo passwd root).
In Mint 17 yad package finds from
https://www.ubuntuupdates.org/package/webupd8/trusty/main/base/yad