I just switched from Classic Shell, and was using the standard two-column format. Here's something I found confusing:
SiB 2.6.4 puts everything in Programs
So, I have created a folder: Programs / "Utilities B" / "LEFT PANE"
I put everything for the LEFT PANE in there.
. . . Why does it move this folder into the User sub-directory from All? Move it back to "All" when done.
Then, you have to drag each Shortcut to the LEFT PANE. I've only ever previously seen that they just appear there.
. . . Put it one level up when doing this, in Programs, to make it easier.
Also, only Shortcuts can go in the LEFT PANE, not folders that contain more Shortcuts.
. . . So, put the Frequently used Folder/Shorcuts (Sound, E-Mail, Quick Access) in Programs