If you continue to install the extension you can insert a google map into Dreamweaver via
Insert > DMXzone > DMXzoneGoogle Maps
but you cannot add the 'Drawing' Add-ons in the 'Add-ons' tab.

You get the error message
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"While executing onLoad, the following JavaScript err(s) occurred:
At line 104 of file "MyHardDiskname:Applications:Adobe Dreamweaver CC 2014.1:Configuration:Commands:dmxGoogleMapsAddon_Drawinghtm":dmxBrowser.openURL is not a function"
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I have tried this both on Mac 10.10.3 and Windows 7 machines both running 64 bit dreamweaver CC 2014.

Has anyone successfully installed and used this extension on a 64 bit Dreamweaver CC 2014???

Hello,
Please update to the latest version, the issue has already been fixed.