Saves
 

Is it just going to be a case of entering a key somewhere to get the full version of the game? If not, is it going to be possible to transfer saves from the demo over to the full version?

Nope, there are no keys, you will have to buy the full version. And i don't think you can transfer saves...

There is a saves folder for the demo. Might be worth copying it in case it does work with the full game.

the saves are in a folder, so it should be very easy to transfer saves. Well see for sure when full arrives of course.

I don't think transfer the saves will work. According to what's asked in this post, the full version differs enought to assure that transfering saved games won't work.

play the full game again man ... it's a awesome game :-P

Realtoltek
 

Saves from Demo not work at full game at me.
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Medical Marijuana Doctor

Not surprised, besides the demo is a demo version and it is made quite obvious, so no i can't imagine why they are compatible, besides in the demo you get several bonuses and the rage chest early on for more fun right away.

King's Bounty: The Legend is a fantastic game, so I think it's not a problem to play again :)