Is ProofMaster compatible with Mac OS X Snow Leopard

As of version 4.x, ProofMaster is compatible with Mac OS X 10.6 Snow Leopard.

Version 4.x is also compatible with Mac OS X 10.5 Leopard.

Older ProofMaster versions (such as 2.x and 3.x) are not compatible with Mac OS X 10.6 Snow Leopard.