Yes. IMO, using HBPC is much easier than all the key-punching required on the unit.
Hint: To change a number of waypoint icons at the same time.
Select all the waypoints to change using Left-Click with Shift-key and/or Ctrl-key.
Then Right-click in the Icon column, select change icon, then pick icon.
Copy&paste, cut&paste functions are useful inside a GPX file or from GPX file to another GPX file.
Do not create duplicates within a GPX file.