I have the latest regular version and also the latest beta version (as of Jan 21, 2021).
I cannot get the split to work on laptop or the screen hooked up to the laptop.
What could it possibly be? I have both a Dell Inspiron 15 and a Dell 27" monitor hooked up to it. I am trying to use both screens (laptop + 27 inch). All I want to do is have 2 horizontal splits on each.
I have had so many issues with your software. I am just ready to give up. A feature works and then all of a sudden it stops working. Ready to give up.

Hi. No. I don't get any errors. It just doesn't want to work.

Same for me, was working fine until I had just did the 20H2 update for Windows 10, now my splits show in the app but Windows acts as if splits have never been enabled. Well, except that if I hit the maximize button instead of it maximizing across the whole screen it literally does nothing. I'm using an Ultrawide monitor I had split down the middle so just 1 split.

UPDATE, full uninstall/reinstall fixed my issue, working fine now on 20H2.