I am unable to download the latest RC from within Orion RC (or elsewhere as far as I can tell). While Release Notes, etc shows that a new version, Orion RC - Apr 23, 2024, is now available, I can't seem to download it with either the Orion RC installer included in the original download package nor with Check for Updates from within a running Orion RC [running Version 0.99.127.2-rc (WebKit 619.1.1) Build date Apr 4 2024].
I can confirm that both About Orion RC ... and the Plus tab from within Preferences show that I am a Plus subscriber if that is now a requirement for accessing the latest RC.
Check for Updates from within an Orion RC 127.2-rc running on Catalina also does not offer a newer RC though I should note that instance is not activated with Plus and shows itself as the Free version if that now makes a difference.
I also couldn't find the RC using the manual CDN download links listed in the FAQ though I could only guess what the version number would be for this RC and not sure those are supposed to host RC versions or just betas.
I expected Check Updates to provide a popup that offers "A new version of Orion is available!..." with the standard buttons to "Install Update" or "Skip This Version". At which point I could select Install Update and then try out the April 23, 2024 RC on my Mojave system.
0.99.127.2-rc
Mojave (10.14)