@Tintronic I have not joined early access as well but received the notification to upgrade to this firmware from my OC300 v1 controller and did it. I have no complaints so far regarding the operation...

No. Only "Stable". But I am not subscribed to "Beta" versions. And I am always updating only to "Stable" versions of firmware.

Thank You! I have succeeded in upgrading two switches as per your instructions! But no way to update the firmware of the access points :(

@MR.S I have already tried that. The only wizard that starts after that is "Set Upgrade Rule" wizard, please see the picture below. "Next" is grayed out. And no target version.

I have a problem with updating firmware of the connected devices (access points, switches) via OC300 controller. I receive a notification, that a firmware upgrade is available, that I should go to...

@MR.S Thank You! Your solution helped me.