Push and HOLD pinhole with thin wire.  The Status LED will turn to a “blinking amber'.  Keep holding, and when it turns to 'blinking green', immediately release the pinhole. 

After 1 second, push and HOLD the pinhole again.  The Status LED will turn to a “blinking red”.  Keep holding, and when the Status LED turns to 'solid amber' or 'solid green', immediately release the pinhole and wait.

Firewall will reboot and be available in approximately 3-5 minutes.  Pings to 192.168.1.1 should then work.

You will then have to set up the router from scratch I suggest reading each window in the GUI as it appears. Once complete load a backup config file onto the router, note you cannot load a config file straight away as you get a file to small error!