Experimenting with Terrain and Target Mover

Hi all, I have a lot to learn but am asking for a nudge in the right direction please.

In Example Scene 2 Im trying to replace the follow mouse-cursor with double click.

Ive tried by replacing the AIDestination Setter script with the Target Mover script on the bot object.
Ive set the Target Mover to mask nothing (for now), Target = Target (Transform) and enabled ‘Only On Double Click’

but in runtime the target object is disconnected from the mouse and the bot doesn’t move towards it or any location if I double click.

Any help gratefully received.