Version: 2.1.1-nightly-20230607
Date: 2023年06月07日T03:09:08.177Z
--> CLI Version: 0.33.0

Version: 2.1.1
Date: 2023年06月30日T16:04:40.277Z
--> CLI Version: 0.32.3

WHY?

Hi @wavoigt. There was a problem in Arduino CLI 0.33.0 that caused uploads to the new UNO R4 WiFi board to fail for Windows users: arduino/ArduinoCore-renesas#10

It was necessary to make an emergency patch release of Arduino IDE so that the board would be functional for everyone when they receive their orders of the board. The Arduino IDE project manager decided that, in order to move quickly, we should make a release of Arduino IDE that contained only that single fix compared to the 2.1.0 release. So the fix in Arduino CLI (arduino/arduino-cli#2234) was added on top of the version of Arduino CLI used by Arduino IDE 2.1.0 (0.32.2) and an Arduino CLI 0.32.3 release was made. The version of Arduino CLI used by Arduino IDE was then set to that 0.32.3 release (#2121) and then the Arduino IDE 2.1.1 release was made.

There have been some other significant changes to Arduino CLI since the time of the 0.33.0 release which will require companion changes in the Arduino IDE codebase. So the alternative approach of bumping the version of Arduino CLI used by Arduino IDE to 0.33.1, making the companion changes to the Arduino IDE codebase, and validating those changes would not have been possible to accomplish in the available time. The work to update Arduino IDE to use Arduino CLI 0.33.1 will be done at some point in the future, after which the nightly builds and following production release will contain the fixes and advancements made since the time of the Arduino CLI 0.32.2 release.

If you do need the version of Arduino IDE that contains Arduino CLI 0.33.0, you can download the last beta tester build from before the reversion from the "Artifacts" section of this page:

https://github.com/arduino/arduino-ide/actions/runs/5243125693#artifacts

Note that build is still affected by arduino/ArduinoCore-renesas#10 so it can not be used with the UNO R4 WiFi board on Windows. But it will work perfectly for any other board and even with the UNO R4 WiFi board on other operating systems.