The comments complaining about the choice of license reminded me that a FSF licensing intern did the same, and demanded it be changed due to some false claim about it being a derivative work[1]. Let me remind everyone that there was probably a good reason for using a permissive license, and no-one has the right to demand changes based on their definition of freedom - unless they stepped up and contributed.
If this truly injures you, you can either do your own rewrite or, like Muse Group, outright buy the rights to the software and relicense.