Read here: http://www.topsony.com/forum/far-manager-f31/flash-k800-cid53-k810-software-cid53-begginers-t11605.html#post89845 and use these files:

1. K770_R8BE001_MAIN_GENERIC_VI_RED53
2. K770_R8BE001_FS_EUROPE_4_RED53
3. HB1-06_Gen_CDA102568_13_R8A_GENERIC_EUROPE_4