Hi, I own a KPW 5.3.1 and installed the Kpv using Kpvbooklet 0.4.2a.
It does not work perfectly. The program is slow and the menus do not always work. Major problems with landscape mode (menu "sreenmode" does not work, the menu "screen rotate" does not work, only works "Vertical text" but not perfectly). The text of the pdf sometimes fade.
Hypertext epub files do not work.
In the folder I also found Kite and Launchpad but I have not copied to the Kindle, I had to install them?
P.S.: use google translator, sorry.