We have recently discovered a bug in the update process of the Bash Bunny, which causes boot-loops. The bug is triggered if the upgrade file had been extracted, renamed, or was otherwise altered.
Fortunately, we have now found a fix for the issue:
Plug in the Bash Bunny and unplug it immediately when the initial green LED turns off
Repeat step #1 three times
Plug the Bash Bunny back in and wait for it to reset. You should see either a "police" pattern