It is now possible to specify the Granite version when exporting data in PTC Granite format. Both File > Save As and File > Export > Active As offer the choice between Granite 1.0, 2.0, 3.0, 4.0, 5.0, or 6.0. Version 6.0 is the default.

This solves the compatibility issue when importing those PTC Granite files into earlier versions of Wildfire.