@John - What i did was installed Xiegu¡¯s latest 1.1.8/1.1.9, then i downloaded Georgy¡¯s original modified 1.1.6 base, ssh¡¯d in to the x6100 and copied the file over to /usr/firmware. Then i just selected 1.1.6 from the list and did the ¡°upgrade¡± per usual. It will leave the 1.1.9 APP alone and just reinstall/downgrade the BASE.