I just connected to a PC WINDows 7and It does recognize the kindle. I am able to browse and copy off files.
I dont believe it did connect before on a different PC
The jailbreak file is there
$Id: info.txt 7669 2011-10-19 00:14:54Z NiLuJe $
Hello! If you're wondering what all this weird stuff on your Kindle is,
I'm a jailbreak hack! There's a good chance that I came from here:
https://www.mobileread.com/forums/showthread.php?t=88004
I'm at version 0.10.N, so, if you wish to uninstall me, you'll at least need
the uninstaller from that version.
-- NiLuJe