Arduino project -- 2

I have used this script before, but now it is saying
Arduino: 1.8.19 (Windows 10), Board: "Arduino Uno"
RFIDuino_demo2_lockbox:42:10: fatal error: RFIDuino.h: No such file or directory
#include <RFIDuino.h> //include the RFIDuino Library
^~~~~~~~~~~~
compilation terminated.
exit status 1
RFIDuino.h: No such file or directory
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

The RFIDuino.h is in the zip. file.
I need to use this particular shield and anntenna due to range an the company is no longer in business.