Simple yet effective wordpress google map plugin to create unlimited maps with single or multiple markers.
Now you can update plugin using one of following methods:
A) Deactivate old Google Map Professional plugins from admin panel, delete it and upload new plugin.
B) Login to Ftp and go to /wp-content/plugins/ . Take backup of
google-map-professional plugin and then Delete
google-map-professional folder from ftp and upload folder of latest downloaded plugin.