HxC and FlashFloppy are both replacements for the factory firmware of the Gotek. Either offers much better compatibility and open up the possibility of hardware add-ons for an improved user experience such as rotary selector knob, and OLED display.
HxC is a pay license, but FlashFloppy is free to install and use.
The download below should give you everything needed to get the original EPS working properly with FlashFloppy. The disk images will also work with HxC, but HxC doesn't need the special configuration files as the latest HxC firmware can be set to the proper interface/disk types very easily using its internally stored configuration menu (accessed using button combinations).
https://mega.nz/#!uddmHK6B!6qyf4Qg-Y1qy ... lH23_f-rAs