The classic Arduino 0018 or similar lightweight version is perfect. It compiles fast and produces highly compatible HEX files.

Open Arduino IDE 1.8 and load the standard example ( File > Examples > 01.Basics > Blink ). Click the Verify/Compile button (checkmark icon).

Proteus 89 SP2 Professional is a cutting-edge software package designed for electronic circuit design, simulation, and testing. This software offers a wide range of tools and features that enable users to create complex electronic circuits, simulate their behavior, and test them before building a physical prototype. With Proteus, users can design and simulate analog and digital circuits, including mixed-signal and RF circuits.

: Ensure that the .IDX and .LIB files were pasted into the active data directory and that Proteus was restarted after installation.