In-case of software issue for models KS-7060,8070 and 9080 you can use their file and put in USB Flash and rename file name to Rom.bin and after inserting USB device to receiver you press and hold power-button on front panel and turn on receiver from switch. it will quickly upgrade and get back to normal condition.
For model KS_99 PRIME Rename software to Gxrom.bin and follow same procedure as above.