Duplicate Dictionaires

I know I can’t be the only person with this, but when I want to open a dictionary (either Applescript Editor or Script Debugger) I see duplicates; some many times.

How do I fix this?
Are the dictionaries in a folder? (I hunted through /Library but noting popped out to me)

I remember a while back finding a script or shell command to fix this, but lost it.