Something similar has happened to me with the portable version of the last two Betas versions, the .800 and the .1100, installed on an existing profile of old versions.
1- The favorites icon in the top bar does not work.
2- Since the access the favorites from the sidebar, it shows me the folders, but empty, with 0 markers.
3- In the first installation of the .800, I could not define the root folder to show in the top bar of favorites (the bar which can be hidden)
The only solution I have found is to export everything exportable, and create a new profile, so in some cases, it has worked for me, at least with the latest .1100 beta version.