Yes, you can reload the data and grid files for all your maps with one click in Surfer. Click the File | Reload Map Data command to reload all files associated with a Surfer plot.
Note: if you are reloading base map data, and the base map file being reloaded does not have drawing properties embedded in the file (e.g. BLN or BNA), any line or fill property changes you made will be removed.
Updated November 10, 2017