Just enter your search type, the output you require (GPX, GPI, JSON, Google Maps), your username (optional, unless you do not want to include your own or captured munzee), and if you want to include Special Munzee. Once you have filled the necessary fields, just click 'Go'. The file will be created and you just need to save to your computer when prompted. You can even create a Bookmark to the website with all your details entered to save time when you update again.
Upload to your GPS device and away you go. I uploaded mine to c:geo, but it said there was no cache, so I'm trying out different GPS apps on Android to see which is the best for Munzee hunting.
Many thanks to DFX! Brilliant!