Autodesk's behavior has long been acknowledged as despicable, marked by such offenses as attacking instructional fan sites and managing to get some ignorant judge to rule in favor of their rip-off licensing scam. They claim that when you buy their software, you only buy a "perpetual license"; so if you find that you can't use the software, you can't sell it to someone else. If you tried to sell an unopened, new copy of their software on eBay, for example, their lawyers would threaten eBay and have your auction canceled. Yes, they did this for ONE copy.
Can't innovate anymore? Just behave like assholes.