Duane, when I tried exporting it locally, I did not have any errors when importing files. I did encounter some problems when specifying the path of the export templates, though. I resolved that by bundling them inside the build directory (really the directory of the game) when the game is exported. BTW, the export templates are first built, then moved to the game directory.
As for the "export_presets.cfg.f-droid" file, you can find it here in the Github repo of the game.
With respect to the expected location of the templates when the executable is built, I don't know whether it expects them to be in a directory named "3.3.3.stable". That was one of my suspicions why the built executable couldn't find the export templates in the first place.