[6] Importing - InclementDab/DayZ-Editor GitHub Wiki
How to go to your local player profile?
Open this location Documents\DayZ\Editor
This is where you want to drop your mapping to later edit. This "Editor" folder is also the place where the Brush and Building Loot are configured but also where you import from, and exported mapping will be.
How to import mapping while in the game?
On the top left corner of your screen go to file, import and then select the correct format you wish to import into the editor
Then enter the name of your file (without the .format at the end as shown here) and click on Import.
And voilà, here's your imported build!