Hi, thanks for buying the game! Yes it should be possibly. You need to find the location for the save files and replace the one from the demo with the one from steam. If I remember correctly they are stored in C:\Users\%username%\AppData\LocalLow\PocketAce, the filled is called Savefile.es3
It did work btw, that you! I beat the third boss and unlocked almost all the characters (cow girl left) w/o using a single potion, I'm pretty proud of myself. Is there any place where we can make suggestions, or is the game a done deal and wrapped up?