kindle-5.4-jailbreak.zip contains seven files:
- bridge.conf
- bridge.sh
- developer.keystore
- gandalf
- jb.sh
- json_simple-1.1.jar
- Update_jb_$(cd mnt && cd us && sh jb.sh).bin
Only those files should have been copied to your Kindle's root directory. No other files should have been copied to your Kindle.