To use HPGComm, simply connect your calculator and computer to the serial cable and click Start at the left.

You should then be able to:

• Send and receive files by pressing [SEND] or [RECV] on the calculator and selecting Disk drive...
• Send large games by pressing [RECV] from the Aplet view, and selecting HP39/40 (Wire)
• Receive screen captures by pressing [ON] and [1] simultaneously on the calculator.

Make sure your desired directory is displayed above, press Change Directory to change it.
You can only change directory when the program is stopped.

Change other settings by pressing Preferences... and press Quit when you're done.