Guys, I was working installing Igo 8 and the units nows turns on and reboots seconds later after showing the menu screen

I replaced thesys.txt on My Flash Disk/APL2/igo that's it.

The other changes were made on the SD card files.

I removed the SD card and I still get the rebooting.

What could be the problem?

Is there anyway I can do a HARD RESET to put it stock?

I have the 2.0 update on it

Mine reboots when I enter a destination every time. I have a modded data.zip that I put back in after 2.0, there must be some conflict. I might have to start from scratch and go one by one. Something tells me it has to do with the delete route button.