To help work around the issue where Olaf the Peddler disappears if you restart the demo, all the items you can purchase from him are for now already added to Village Storage when starting a new game. This will still not affect in-progress games.
To start a new game, please find Hawthorn's save file in your Windows user data, in this folder:
C:\Users\YOUR_USER_NAME\AppData\Local\Anthro\Saved\SaveGames
And delete PersistentSave.sav (or move the file away if you want to restore it later).