Yes! Grapher allows files to be saved in previous version formats. To save a file to an older version, click the File | Save As command. Next to the Save as type, click the existing option and select the desired format from the list. After clicking Save, the file is saved in the format selected.
Select the desired format from the Save as type list.
Note that new features may not translate to older versions. So, some items may be displayed differently when saving back to an older version.
Updated September 29, 2016