I think this belongs in the Assistance forum, and yes there are other mineral stackers, SCMToolkit is a good one. It can be downloaded here,
http://www.supremestarcraft.com/do/downloads.php.
To stack with it, click the units button, and scroll down to the mineral patches you placed, make the X and Y coordinates for them the exact same, and they will be stacked, granted this is much harder then Starforge, it also works.