With a Range selection, go to Share >Export File (the range selection is automatically used.)
If Export File is not avialable from your Share menu:
Click on the Share button (with the storyline "active"/selected)
Go to the bottom of the list to Add Destinations
Find Export File and drag it into the left column
Click on the Export File in the left column and set the *defaults* you want to use for your exports
Close that dialog and click on the Share button again. You should be able to find Export File in the list.