Dear Technicsplayer
Thank you very much for all your help. I received the files you sent and followed the instructions you gave, and I was able to upgrade my KN7 to version 1.6. You have been very patient and kind. And I am grateful to you and to all the members of this Forum.
I am still battling with the problem of the deep and bassy sound around the Middle C area of my KN7 when the APC button is switched on. I am willing to try a number of things to find the solution to the problem. If it was a hardware or system problem, I suppose the upgrade process would have detected it. It may be that the original owner went through some settings that I am currently unable to figure out - although I wonder if that could be the case. This is so because even when I initialise the keyboad, and proceed to make my playing selections and start playing,I still experience the same thing very deep bassy sounds around the Middle C area.
If everything else fails, I may have to seek to meet up with some Forum member here in London who has a KN7 and who may be willing to help, so that I can check out mine alongside that persons.
Again, thanks for being so wonderful. And if you have further suggestions that might help me to solve this problem, please do not hesitate to let me know.
Regards.
Kenny