How to ignore the folder containing .embyignore?

[Fweep 11]

I have folders named .hidden in which I previously had empty files named .ignore. This was sufficient to hide the entire folder from Emby.

The folders reappeared due to the changes in 4.9, so I renamed the .ignore files to .embyignore and put an asterisk in each one. I rescanned my files but the .hidden folders are still showing up in Emby.

For example, I have folders:

• TV/Programs/Girl Code (2015)/.hidden
• TV/Programs/Girl Code (2015)/Specials
• TV/Programs/Girl Code (2015)/Season 1
• TV/Programs/Girl Code (2015)/Season 2
• TV/Programs/Girl Code (2015)/Season 3
• TV/Programs/Girl Code (2015)/Season 4

Inside .hidden is the .embyignore file along with some conversion notes and scripts—no playable content.

Emby (web & Roku) shows .hidden as a "season" of the TV show, with no content. What's the trick to getting rid of it again?