1.2 Microchip Studio
There is nothing to add to that. Follow the instructions on that page and then return here.
If you like, you don´t need the Arduino IDE. You only need the avrdude.exe and avrdude.conf (see below). This files you have to save to a place you want to and then tell the "external tools" were they could be find.
A tiny tutorial to empower your Microchip Studio IDE to flash the Arduino Board now (2023) is ready. Its nearly the same as on the site of Ron Hiestermann, but you don´t need to install Arduino IDE! Thank you Ron for your work.
You need this "argument":
-u -v -patmega328p -carduino -D -PCOM15 -b115200 -Uflash:w:"$(ProjectDir)Debug\$(TargetName).hex":i -C"C:\Your_File_Address\avrdude.conf"
Trouble? Ask me...