https://visualflow.org/
VisualFlow - Change one thing at a time. See what changed. Go back if it breaks.
Run and compare before / after. See which part caused the shift. Save a working version so you can come back to it.
one thing at a time
https://www.sony.jp/products/Consumer/PCOM/Software_01q3/VisualFlow/index.html
VisualFlow Ver.2.1
ver 2visualflow1