PLEASE READ BEFORE BUYING 4/24/2021
The creator has seemingly abandoned this product. I advise you to go with MagicaVoxel or the much more difficult to learn Qubicle.
The button for exporting to .VOX is broken, it just does absolutely nothing. Exporting sprite sheets is almost non-configurable in regards to changing desired formatting for importation into Gamemaker or other software. A cool piece of software but unfortunately the creator has abandoned whatever potential it had.