PTGP has been renamed TransformGenerator - and a new release is now available (V5.5) (The name was changed to be more consistent with the AAVSO TransformApplier tool.)
The primary changes made are :
1. The addition of 3 sigma error lines on the transform plots
2. The addition of scrollbars on the main menus
The update, an updateded users guide and revised installation instructions are available at www.aavso.org/tg