Adobe is about 34 years old, so the copyright on any program that interacts with an Adobe file format (e.g. postscript, pdf) cannot have expired yet (in the abs

Adobe is about 34 years old, so the copyright on any program that interacts with an Adobe file format (e.g. postscript, pdf) cannot have expired yet (in the absence of time travel). So if the source code did not come with a license, it is their responsibility to obtain one, or they can't use it.