I have a map with about 250 markers on it. I exported the markers file and opened it in Excel so that I could quickly make some batch changes to the icons based on the marker group. I then saved the file and attempted to import it into my map, but nothing happened.
Thinking that I might not have been able to import over existing data I created a new map and changed the map id in the data so that the markers would apply to the new map and tried to import again. Again, nothing happened.
Initially I was trying to find the marker data via PHPMYAdmin so that I could make the edits with some quick SQL statements, but I was unable to find where the map data is stored.
Please update both versions of Google Maps plugin and try again. If you still have problems with importing markers file please contact us through the Internal Support and we will help you to solve this problem.