Thanks Eric. Interestingly odd. I fired up my old netbook earlier but after your post, which was also still at 33450, and it neither would update to 33453.
The download of the installers is successful.
Edit. I booted the Windows 10 main installation and when I ran the updater it would stay at database 33453. When I set the update server to the beta server it updated to 33454. Apparently the regular server is slightly out of sync.