Editions

Feature	Core	Pro
Surface-following texture rig workflow	Yes	Yes
Create Guides, Create Control, Build Final	Yes	Yes
Mirror, UV, Projection, and image sequences	Yes	Yes
Main texture layer order	Yes	Yes
Revert and Edit Existing Setup	Yes	Yes
Masked child textures	No	Yes
Nested masked textures	No	Yes
Secondary texture overlays	No	Yes
Hierarchical family layer order	No	Yes
Child/nested independent controls	No	Yes

Core

Core is a useful standalone texture-rigging workflow. It is free and open source under GNU GPLv3. Its public source may be studied, changed, and redistributed under GPLv3 terms.

Pro

Pro is the paid commercial edition. It includes the Core workflow plus advanced layered-texture features. It is proprietary; a valid purchase permits personal and commercial production use and internal workflow customization, but does not permit redistribution or public sharing of the tool source.

Pro only

Masked children, nested texture layers, secondary overlays, and their hierarchy-aware ordering are Pro features.