Because all of the Infinite Builders were built using the nodes that come shipped with Blender, they should work in any version of Blender that has these nodes, though I would always recommend anything above 2.8 to be certain as this is the version they were built on All of the Infinite Builders are fairly GPU intensive, on an RTX 2060 with 8gb ram it's very smooth in the viewport, but on a mac with an ATI HD5770, the updates are somewhat slower, though still workable.

The only limitation you will find is how many subdivisions your system can handle and render. It was built on an i7 8th Gen 8750H, an NVIDIA RTX 2060 with 16Gb ram.

You'll receive individual manuals for The Infinite Tree, Wood and Rock Builders, the ITB Tree catalogue, tutorials are available on links on each page. The manuals are in the downloads section.