You haven't been granted any rights. A right, or interest, and a license, are very different.
A license is revokable by the grantor at any time.
That seems to be the version given by the software industry now. And why wouldn't they say that? Selling the same product to a same customer multiple times in different formats is a common habit of music industry, and the software industry is happy to follow. This however restricts consumer rights from what they were say, 25 years ago. When you bought a product, you owned that particular copy, and could do whatever the hell you wanted with it.
Since the Internet loves car anologies, imagine that you've bought a new car, say a BMW. And after you walk out from the store, there's a booklet on the driver's seat explaining that the company doesn't want you carrying any pets in the car or it'll take the car back and keep the money you paid for it. And they'll want to send a guy unannounced to check the car for dog-hair every week. Now, you've already paid for the car, so do you expect this booklet to be legally binding? Furthermore, none of your previous cars had these booklets, but suddenly every car seller has one, so if you want a car, you'll have to submit to the dog hair checks.
Do you perhaps feel like you've lost rights at some point?