Me again...
Just a heads up regarding two known issues in this build.
File Opening: The new file selector appears to work, but the selected file is not actually loaded into the editor.
Settings Accessibility: VoiceOver and TalkBack currently treat setting labels and their switches as separate items instead of a single unit, making navigation tedious.
This second issue has been there a long time...
Anyway, I am working on fixes for both and will have them ready shortly."