I guess not everyone will want that, so it would be best if it could be changed somewhere - I didn't see a way to set it in Voxelizer, hence this thread.
As it is, the behaviour of Voxelizer is the opposite of the AutoDesk 123D app collection. I'm regularly using TinkerCAD and MeshMixer, and almost every time when I get back to Voxelizer, I try to use the right mouse button to pan - which in Voxelizer moves the plane.
So, my preferred way would be:
Left Mouse button: select
Middle Mouse Button: strafe, move plane
Right Mouse Button: pan