DT3 beta dmg file could not open in catalina beta4

ScreenShot-2019-07-29-0931

The betas aren’t notarized for Catalina yet.

Thank you for your reply.
I have noticed that some people already using DT3 in catalina(for example: /t/devonthink-3-sorter-and-catalina-beta/48656 ), am I misunderstand or is there a way to try out DT3 without it been notarized for catalina?

Same problem here. Short Date & Time# worked in previous Catalina Betas. on 19A526h and no go.
When will we be able to use it. I’m stuck now.