trying to program ATtiny 85/84 but can't find the board from Board Management

hi guys:
I am trying to use program ATtiny 85/84, but I can't find the download option from Board Management. I try to use download the ATtiny85/84 files to hardware folder in Arduino, but I don't see the hardware folder in there anymore. Is there any way I can program ATtiny chip? :o

I think I find the way to deal with it.

I used