Before downloading the script, open After Effects and go to EDIT > PREFERENCES > GENERAL. In this tab, search for option “Allow Scripts to write and access network”, and make sure it’s checked.
Download the script, and place the folder from the archive in your After Effects folder > Support Files\Scripts\ScriptUI Panels
Now you can access it from your Window tab inside After Effects. Additionally, you can run the script directly by going to File -> Script -> Run Script. Make sure All File Formats is selected, in the bottom right corner
Note: Some users have reported that having a different language in After Effects might cause problems. If you can’t run Utiliy-Box with the instructions above, try setting your After Effects language to ENGLISH
Utility-box is completely free for both personal and commercial purpose. If you enjoy this tool, consider a donation. Any amount is greatly appreciated 🙂