How can I download Premiere Pro Beta 14.9?

Hello,

I am currently facing a lot of problem with Speech to Text in Premiere Pro Beta 15 and 15.1 after upgrade (My transcription is stuck forever at Uploading to server)  so I want to downgrade it to Beta 14.9 but in my creative cloud app I can't see it in the older version list. 14.9 is the only version where my Speech to Text works perfectly and I need it a bit urgently for a project but not able to find the version anywhere. Can anyone please help?

Thanks