in plugins/google_map/google_javascript/wagmp_map_1.php
update line 125 from:
enabled: true,
to:
enabled: fromAddr,
and then update line 266 from:
directions.load('from: ' + fromAddress.full + ' to: ' + address_0.full);
To:
if (fromAddress.enabled) directions.load('from: ' + fromAddress.full + ' to: ' + address_0.full);