A word of warning when using DfuSEDemo.exe
Uploading means downloading from the device into your computer
Upgrade/Verify is for loading new software into your device
So ALWAYS first do a "Upload" (e.g. a download) from your device into your computer to create a backup of the firmware in a safe place
Then you can test new SW and restore to the old if needed.
I tested and the restore works!!!!
