The manual for the software Pinch 1.5 can be downloaded here:
Manual PinCH 1.5 (Version 15.01.2012)

The manual for the software Pinch 2.0 can be downloaded here: 
Manual PinCH 2.0 (Version 15.01.2015)

The manual for the software Pinch 3.0 can be downloaded here: 
Manual PinCH 3.0 (Version 25.08.2017)