Some places still observe the "first sale doctrine" which means that if you legally got a copy of a piece of software, you have a right to use it whichever way

Some places still observe the "first sale doctrine" which means that if you legally got a copy of a piece of software, you have a right to use it whichever way you please -- so, in such a jurisdiction, as long as you obtained it legally, you have the right to use it. (Analogy: You buy a music CD; You do not need a specific license to listen to it, and you're not violating anything even if it has a sticker that says "by opening this sticker, you hereby agree to never play this using a Sony CD player, and to never play it at faster than 1.25x on any non-Sony CD player)