Hi Chris,
Currently the only packages you can install with CJT Pro is the scripts we have packaged in our Scripts page here: https://css-javascript-toolbox.com/category/scripts/
You can still try to install the FooTables script, but you would need to create the appropriate code blocks or templates and link them to work, using either the assignment panel or via the CJT shortcode embedder.
Kind Regards,
Damian