Use these files:
1. C510_R1FA035_MAIN_GENERIC_KT_RED53 (Downloads > Firmware > C510 > R1FA035_RED53)
2. C510_R1FA035_FS_M-EAST-N-AFR_RED53 (Downloads > Firmware > C510 > R1FA035_RED53)
3. HB1-06_Gen_CDA102568_109_R8A_GENERIC_M_EAST_N_AFR (Downloads > Custom Files > k850custpack)
Then update via SEUS to lastest version R1HA035!