: Open the extracted folder and double-click arduino.exe to launch the software without a formal installation process. Arduino 1.9.0 vs. Modern Versions (IDE 2.x)
: Solved the issue of managing numerous open sketches by making tabs easier to navigate. arduino 1.9 0 download
As of 2026, Arduino has moved its primary focus to (current version 2.3.8), which is significantly faster and more stable. 1.9 Installation - IDE 1.x - Arduino Forum : Open the extracted folder and double-click arduino