The standard "Lite" versions of AVR Studio sometimes restrict certain debugging protocols or memory views. To get the full "Extra Quality" (Professional) experience with full debugging capabilities, you should not use the web installers but rather the .
is a legitimate, older Integrated Development Environment (IDE) that is available for free through official channels. Official Source for AVR Studio 5.1 The most reliable way to obtain this version is through the Microchip AVR & SAM MCU Downloads Archive avr studio 51 download extra quality