Fix the edit module.
I got big problems editing a map. After a number of operations like switching things off and on, I get the basic map with no option to edit anymore. And please create a function to COPY styles I made, so I can vary on the theme. I now have to save over my previous wrok.

Hi,
Thanks for reaching out. Unfortunately there is a limit to how many styles that Google applies to the map. Beyond this limit they revert to the map’s default styles. I’ve raised a bug with Google here:
https://code.google.com/p/gmaps-api-issues/issues/detail?id=8043
At the moment there is no workaround for the issue other than trying to reduce the number of styles you are using, sorry! Instead of toggling off all of the most specific features, try disabling one of the parent features and clearing out all the settings underneath it. Hopefully Google will find a better way to support this in the future.
As for the copy feature, this is something we are looking into adding as well. For now, you can copy the JSON from one of your styles and create a new style using the JSON Import feature. This way you’ll essentially be able to copy a style but I agree, a button would be much more useful.
Let me know if you need anything else.