To force an update with the newer build of firmware 1.9.16, connect your KT and open the file "version" (lives in the folder ".kobo") with a text editor. You'll see:
Code:
xxxxxxxxxxxxxxx,2.6.35.3,1.9.16,2.6.35.3,2.6.35.3,00000000-0000-0000-0000-000000000310
The most interesting part is
1.9.16 - always present if you have 1.9.16 installed (the other parts may differ, doesn't matter). Change this to
1.9.14 and save the file. Now you can start a normal update procedure, via desktop application or by hand, as described in several postings.
I have tested this a few times without loss of books or settings on my KT. Nevertheless, make a back up of the books.