Flash with XS++ v 3.1 if you have EROM CID52 and use these files:
K810_R8BA024_MAIN_GENERIC_SM_RED52
K810_R8BA024_FS_EUROPE_3_RED52
HB1-06_Gen_CDA102568_12_R8A_GENERIC_EUROPE_3
If you have EROM CID53 use these files:
K810_R8BA024_MAIN_GENERIC_SM_RED53
K810_R8BA024_FS_EUROPE_3_RED53
HB1-06_Gen_CDA102568_12_R8A_GENERIC_EUROPE_3
And read here: http://www.topsony.com/forum/far-manager-f31/flash-k800-cid53-k810-software-cid53-begginers-t11605.html#post89845