For biofeedback scan setup, is it normal that the receiver’s red light doesn’t turn on when connected? Also, how can I set the scan to run only for an hour? It kept running beyond three hours last ...

It is normal that the receiver light is not on when doing biofeedback scan, you could find more details in page 6 in this instructions: https://www.spooky2scalar.com/wp-content/uploads/2020/06/Spooky2-Scalar-and-Digitizer-instruction-V1.0.pdf
when you want to pause/stop the program, please try to click pause button in the control tab, and if you have boost and remote accessory, you could consider remote mode to run biofeedback results, here is a video for your reference: https://www.youtube.com/watch?v=uB8Nc02d3Ds  Thanks.