You can move this post if you need to of course, I just think this is the best place for it.
I just have a simple question: If I buy an Early Adopter License, does that give me a sort of premium account, or just a full version of the program? I was wondering because if I change computers, would I have to buy it again or not?
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It upgrades the free edition to a licensed edition (which removes the free limits). You also get a badge on your profile pic - that's it, not really a premium account.
Construct 2's installation is portable so you can use it on multiple computers. Just make sure you're the only person using it (if someone else wants to use it they must buy their own license).