2. Alas, it's been 2 years since I last used KoHighlights. Nowadays, I just use either GoodReader or Marvin for iOS for books I need/wish to highlight.
I backup my Kindles to the PC, though:
Code:
\backup
\kindle
\pw3a
\pw3b
\pw4a
\pw4b
I remember I had KoHighlights pointed to the full kindle backup folder.
7. All FW 5.10.x are safe.
FW 5.10.1.3 is the last version with old KFX DRM but the update blockers all work up to FW 5.10.3.
The update.bin.tmp.partial folder method stopped working in FW 5.11 and SKIP_UPDATE_CHECK file method stopped working in FW 5.12.