I'm gonna tell you what just about every thread says to do but I'll try and do it a different way.
1. Go here:
https://www.mobileread.com/forums/sho...d.php?t=141833
2. Click V.1.01
3. Save compressed folder as "update" (Note: the .zip file extension is not shown when in windows explorer so if you name the file update.zip its actual name will be update.zip.zip)
4. Move this compressed folder to the root of a flash drive (Example- If your flash drive is G:\ then you want to move the file to that location meaning if you put it inside of a folder on the flash drive the dualbook won't find it)
5. Unmount the flash drive and put into a pocketedge that is off
6. Begin the holding of the "menu" and "rotate" buttons then turn the device on
7. Continue holding the buttons until a cursor appears in the right hand corner
Note: The previous guide is for PocketEdge. Also if you haven't bypassed the registration yet that might effect the upgrade. To bypass the registration follow this instructional image: