1, Download this 50MB'ish archive...
[Please Register or Login to download file] It is a backup minus the maps of my Mio M400.
2, Connect your device.
3, Delete everything from your device.
4, Copy the contents of the archive to your device, make sure you have more than one folder in the root of the device, ie not just one folder!
5, Disconnect your device, Your device will reboot and attempt to load the SmartST navigation software.
This will fail with a license error!Now your device is at a state where it can be unlocked to run other software. you have two main choices, iGO Primo 2 (the recommended option), Tomtom Navigator, or even both. (space permitting)
http://www.navitotal.com/showthread.php?8169-Run-iGO-Primo-2.0-on-Mio-Moov-and-Navman-S-series-(and-some-F-series)-in-ten-steps.
http://www.navitotal.com/showthread.php?8018-Run-Tomtom-on-Mio-Moov-and-Navman-S-series-(and-some-F-series)-in-ten-steps6, Be sure to follow the procedures exactly as described!
If you are not sure, or something isn't working as described, ASK!