Error when installing Piezography

I get this error when running instal3800pro.command

/Applications/Piezography/Curves/3800-3880-Pro/Install3800-Pro.command: line 5: /Library/Printers/QTR/bin/quadinstall: No such file or directory

any idea what is reason for this??

Catalina 10.15.6

please see my previous reply

all the best,
Walker