I have updated this to work with firmware 5.1.0.
I removed some of the previous functionality which has now become obsolete, so the bare-bones installation only offers usbnetwork toggle. I verified this to still be working. Other extensions should continue to work, but I'm not giving any guarantees.
I'm calling this version 1.1.0, and it's available here
. Note that this version is ONLY for firmware 5.1.0
(or possibly newer). This version doesn't
work on older firmwares, just like older launcher versions don't work on newer firmwares.
PS: It seems like with firmware 5.1.0, Amazon has unfortunately returned to their practice of aggressively obfuscating java code. This makes it a pain in the ass to understand what is going on -- but of course it doesn't prevent it. I don't understand this short-sighted decision. I personally think that we have come up with quite a few enhancements which make the Kindle more useful and interesting to users. Now it seems like Amazon is again determined to stifle evolution. Ah, whatever, I guess some people never learn.
PPS: If someone at Amazon reads this: I mean it. People enjoy open systems, developers and users alike. By trying to lock people in, you're only locking yourself out from opportunities.