Has anyone had success with the YUMI Multiboot tool to setup a USB with multiple ISO images? I set one up on a few different USB drives and each time i do it, it lists all ISO images to install but no matter what, it only loads and installs the last ISO i loaded.

Installed 1st - Win Ent 7 64BIT
Installed 2nd - Win Ent 8.1 64BIT
Installed 3rd - Win Ent 10 1511 64BIT

If i try to install Win Ent 7 64BIT, it lets me select it but it actually loads the Win Ent 10 ISO instead.

The usb i am using currently is a 64GB HP in FAT32 format (USB-HDD mode)