Thank you Tracy for your & your colleagues' participation in the forum - it's very reassuring.
As I wrote previously, I did not find it necessary to remove the JB, or reset to Factory defaults to install DKL successfully. I installed DKL *after* I upgraded the 3.1 firmware to 3.3.
After installing lite10221452rtm a couple of days ago I notice K3's volume control no longer works for the audio player, & wonder if other users notice this or if it's confined to my K3? Volume control works fine in Kindle mode.
Is there a Playlist specific extension, eg. *.m3u, *.pls ?
Is the extension for DJVU files .djvu?