"Show expand paths preview" not working

I just installed the plugin from the github repository. Created a font with a single glyph made up of open strokes. Applied offset filter. Hit undo. Checked Show expand paths preview. I see no preview.
Am I doing anything wrong?

Uninstall and forget the plugin. The functionality is part of Glyphs now. Try View > Show Preview Offset.

I don’t see a change when I select View > Show Preview Offset, FWIW.

You need to run the Offset Paths plugin once to set values.

Okay, that works for me. Would it be possible for the values to be set from the dialog even if I cancel out of it rather than confirming the offset?

Aaaah, thanks mekkablue. Was working from outdated info. Works now natively