I'm unorganized except I try to put all my scripts into a dropbox so I can have them on multiple machines.
Then find "Stuff" in files: path "\allmyjavascripts\*.js*"
If your text editor doesn't have a Find in files command. I would get a better text editor. I grew up on Visual Studio and am always going back to it just for that command.
When that doesn't work I search all my drives and go get some coffee.