treebrowser opens all files in folder when I change to a directory

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I'm running Geany 1.31 on Fedora 27 (GNOME 3.26) and I've installed the Tree Browser plugin. When I try to move into a folder, I double-click on it to open the folder (I set that in the preferences). When I do that, it seems to open every file in my current folder first. When I was using Geany on Fedora 26 it didn't have this behavior.

I'm attaching a screencast (unfortunately in gif form) to show what's going on.

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So I blew away my ~/.config/geany folder and reinstalled treebrowser and that seems to have cleared things up. I can double-click folders to open them now and it doesn't open up all files in the folder. Unfortunately I didn't back up that config folder so I can't send it to you for inspection.