Clarification on LICENSE

I'd like to try to use this functionality from code.
However, I'm not sure what open source license I can use for this.
Currently the license file is very non-standard. If possible, could you possibly pick a license from https://opensource.org/licenses/ or clarify that this is closed source?
Thanks
Stuart

Start by reviewing the repository's non-standard LICENSE file and the license options at opensource.org linked in the issue. Determine whether the project is intended to be open or closed source, then make the licensing position explicit in LICENSE; the work is done when users can identify the terms under which they may use the functionality.

Written by the indexing model from the issue text.