Doesn't work right with joomla! 3.9 install goes fine but cannot choose a different image or place any markers.all kinds off error show in the concole:
Mixed Content: The page at '/administrator/index.php?option=com_modules&view=module&layout=edit&id=1174' was loaded over HTTPS, but requested an insecure stylesheet 'http://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.3/css/font-awesome.min.css'. This request has been blocked; the content must be served over HTTPS.
And also:
index.php?option=com_modules&view=module&layout=edit&id=1174:269 Uncaught TypeError: $(...).addEvent is not a function
at index.php?option=com_modules&view=module&layout=edit&id=1174:269
And:
Uncaught TypeError: $(...).getElements is not a function
at Object.start (depend.js:114)
at Object.e.extend.$owner (mootools-core.js?385feb78cf26cf817af80ed281663c9e:38)
So it's kind of a mess this plugin