Managed to dig up this old firmware thanks to @rabid_inventor, with any luck it’ll get you back up and running in the mean time: https://gist.githubusercontent.com/Gadgetoid/dd5f29ee0fd332b013af5d0e4e17f502/raw/82b62c7cb9aa8ccee3c4046553c62c4633655b8a/Picade-2013-12-05.hex