The official version inherits the demo archive method:
1.Right click on Devil Land RPG Demo in steam library.
2. Select Manage → Browse Local Files → Copy the save folder inside.
3. Use the same procedure to browse the local files of Devil Land RPG (official version) and overwrite the save folder.
and overwrite the save folder.
Thank you for your support.
Game changes: Increased the skill release frequency of the final boss, and so on.