It has swipe typing plus a lot of other new features/theme customisation that openboard didn’t have.

Yeah, I had the same problem and the same thing fixed it. Fully log out, then log in. Seems like version 19 Changed authentication or something similar requiring a fresh sign-in.

If you like Tree Style Tabs I’d also recommend trying Sideberry. Does the same thing but has some additional functionality.

They have different usage scenarios.

LocalSend is for the occasional sending of files/folders from A to B or B to A (One direction only).

Syncthing’s primary usage is for keeping the exact same copies of files on A and B automatically.

I’d definitely recommend David Mccullough. He wrote quite a few Biographies of presidents. Truman, John Adams, Theodore Roosevelt etc.