Seems you need AVRDude software to program it or get a cheap isp programmer or use this gui program:
https://blog.adafruit.com/2013/02/19...i-for-avrdude/
I have an isp programmer that I paid $7 for years ago and works fine in programming the chips.
https://blog.adafruit.com/2013/02/19...i-for-avrdude/
I have an isp programmer that I paid $7 for years ago and works fine in programming the chips.

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