@sally @Zergling_man @dwarvenallfather There is a copy of the GPLv3 and a note in he readme that says "GPLv3", but not if it's GPLv3-only or GPLv3-or-later and it doesn't say what particular files are under the license.

There are no license headers either.

The only conclusion that can be reached is that at least one file is under the GPLv3-ambigious, but it's unclear as to which one(s).