I have just down loaded beta 170.174 but it is very unstable in Windows 10 (latest version). It just disappears off the screen every few key strokes, and is practically unuseable. The previous versions did that occationally abut mostly made a recovery file. I have been testing the beta with a photobook which is about 30 pages long with many images and text. I save it as a pdf so will be ablle to use it when finished. My PC has an 8 core ryzen proccessor, fast SSD memory and 16GB of Ram, so I dont thik thats the problem.
I find the new publisher great so far, if only it would stay on the screen.