No, that is not how you should install it. You should unzip the entire zip file to the Script UI folder, not just the jsxbin file.
- Close After Effects
- Unzip everything in the zip file to the the "ScriptUI Panels" folder.
- On After Effects 2015 this is usually at "C:\Program Files\Adobe\Adobe After Effects CC 2015.3\Support Files\Scripts\ScriptUI Panels" If you are upgrading, overwrite any existing files.
- Open After Effects
- Go to "Edit->Preferences->General..." and make sure "Allow Scripts to Write Files and Access Network" is checked.
- Open Project CuddlePhish by going to Window->Project Cuddlephish. We like to dock it on the right!