How to use uBitTool
GUI
Read out the contents of a .hex file
- From the nrf menu select Read full flash contents (Intel Hex)

A full image of the .hex file will appear in the GUI.
- From the File menu, select Save as and choose the destination to save your file. Add .hex as the suffix.

Command Line
Read out the contents of a .hex file
Use read-flash which will output the contents to the console. You can
optionally specify a file with the -f/--file_path flag.
ubit read-flash -f ~/Downloads/microbit-hex.hex