I do not believe that search is working in this latest beta version. When I typed in the word "subdivision", there were several thoughts showing in the immediate results box. I wanted to see more details so I clicked on the search button and I was told there were no results. Obviously there were many thoughts starting with this word.
See the attachments.
customized Desktop PC (Haswell i7 4770 3.4 gHz with 32 GB RAM), Windows 10 Pro 64-bit, 256 GB SSD, and a Microsoft Surface Pro 2017, Windows 10, 512 GB SSD, 16 GB ram, i7