After posting earlier on this thread, I contacted Christian Abel and asked for details of the upgrade and he kindly emailed me by return. The content of his email is just the same as that, in Mike O'Regan's post.
I await details of Version 1.4 and have asked his permission to publish them on this Forum.
The strange thing is, that the bugs which Version 1.5 addresses, are obviously fundamental to the KN7000 operating system, so why have they been corrected by a third party and not Technics? Furthermore, why do the updates not appear on the Official KN7000 website? Where are you Chris ??
After silence, that which comes nearest to expressing the inexpressible is Music.
( especially when the music is played on a KN7000....)