下载之后，直接解压就行
官方介绍
Arduino Pro IDE具有满足高级用户需求的功能，同时通过设置“经典” Arduino IDE保持了版本的连续性。
Arduino Pro IDE不提供预安装的内核，因此，要获得开发板支持，您必须使用菜单安装板内核
Tools -> Board Manager...
使用的技术
Arduino Pro IDE基于以下技术：
- Arduino CLI：以守护程序模式运行，它提供了Arduino的所有主要功能
- Eclipse Theia：应用程序的前端基于此开源IDE
- Electron：Eclipse Theia背后的框架，允许用户在桌面环境中使用Web技术
安装Arduino UNO板子
Tools–>Boards manger 输入 UNO
或者点击侧边栏的那个芯片图标
安装ESP32板子
办法来源：https://github.com/arduino/arduino-pro-ide/issues/61
arduino-cli: https://arduino.github.io/arduino-cli/installation/
just open arduino-cli.yaml and add https://dl.espressif.com/dl/package_esp32_index.json
that’s work for me…
但是 这个 arduino-cli.yaml文件不知道怎么调出来。。。
错误
1. 2 UNKNOWN: build failed: exec: “/bin/avr-g++”: file does not exist .
原地址：https://forum.arduino.cc/index.php?topic=660986.0
This error indicates something went wrong with your installation of Arduino AVR Boards. The solution is to remove it and then install it again. Note that this will remove all boards you installed via Boards Manager:
Close all Arduino Pro IDE windows.
Open C:\Users\jett8\AppData\Local in Windows Explorer. The AppData folder is hidden by default. You can unhide it by clicking “View” on the Windows Explorer menu bar, then checking the box next to “Hidden items”.
Delete C:\Users\jett8\AppData\Local\Arduino15
Start Arduino Pro IDE
Tools > Boards Manager
Hover the mouse pointer over “Arduino AVR Boards by Arduino”.
Click the “Install” button
Wait for the installation to finish.
Tools > Boards Manager
Try compiling again.
简而言之：关掉Arduino Pro IDE然后删掉C:\Users\AppData\Local\Arduino15，打开软件再次安装Arduino AVR Boards by Arduino