Updated Side By Side Button behavior so that it adds folders from the Input Line and Stack. Use discretion as there is now no limit on the number of folders. If the total is greater than 2, Windows Tile API will be called after they are all open on the desktop. Note also that non Explorer windows may be caught up in the Tiling.
Another feature is if a single folder is selected or typed in the Input Line, Side By Side will show 2 views of the same folder side by side vertically on the desktop.
The opening, sizing, and moving can be a bit slow. I would use Side By Side when you expect to do multiple drag & drop operations. Or if you are too lazy to move the windows yourself, like me.
Also fixed a bug where folders selected in the ListBox were not cleared after pressing Stack Selected Button.