You will need to install a fresh copy of our custom MinePeon image for your Raspberry Pi:
1. If you are already running MinePeon, first make a backup from the Settings tab (near the bottom).

2. Download this SD card image: Windows: http://setup.hashfast.com/hashfast-minepeon-1.0.zip  Linux: http://setup.hashfast.com/hashfast-minepeon-1.0.img.bz2

3. If running windows, we recommend the Win32DiskImager: http://sourceforge.net/projects/win32diskimager/, If running Linux, you can simply type:
(Where /dev/xxx is the device name of your SD card.  If unsure, type "dmesg" after inserting your card.)

4. Boot your  RaspBerry Pi with the new SD image installed.  Note that it may take up to 4 minutes or so to collect all the current updates from us before it will begin mining.  Listen for the fans to start in your BabyJet.  You can browse here to see when your system comes online and connect to it: http://setup.hashfast.com/.  If for some reason it doesn't come up after five minutes, power-cycle it.  (We've seen some brands of SD card cause it to hang on reboot)

5. Log into the web interface and restore your backed up MinePeon settings (if any).  Note that the RPI will generate a new wallet when you first boot from the new SD image, and will begin mining using that wallet.  It's important to switch your mining settings using the "Pools" tab or restore your backup so that your mining proceeds end up in the right wallet!

If you don't want your RPI checking in for updates, you can disable this in the Settings tab, but I advise you to at least do it manually once in while.  We hope to have some new firmware and software soon!  We also advise you to set a password on MinePeon, especially if exposed to the outside internet.  (not behind a router/firewall)

-Phil