I write software for a living, but as part of a company whose type of products aren't going to be affected by this type of issue (and who modded it down? It was an on-topic opinion, even if you don't agree with it).
The point is that I don't think you should have to pay just to run something you've already got, in the same way as you shouldn't for bug fixes, but should for added functionality.
Legally I can't see how it differs at all from patches to get old software running that is no longer developed, but I doubt anyone here complains about that.
It would have been better to offer the patch to APDL, there's no argument there, but that would just have been a nicety. How do people feel about getting PC users who insist on using OE to at least use Quotefix? And that adds functionality, instead of keeping it the same but working (that assumes, of course, that anyone here would even talk to anyone using OE).