Kawai Synthesizers

I just received a K1r.  figuring the unit is quite older, I decided to
check the battery....it's down below 1 volt, so on the virge of failure

Can someone give me some pointers on what software to use to 
dump/restore patches on this unit before this battery fails (and
for replacement) Windows prefered...the dos based stuff doesn't work
with my usb interface..



Thanks so much
Steve