Version 1.13 changes:

•  Fixed a bug where all the item loot disappeared if you started a new game after beating the game

If this problem still persists, you can quit your current game, and delete the save files manually:

Open the data folder named "Tyrant's Realm_Data" and delete the following files:

• worlddata.save
• playerdata.save

Thank you for playing Tyrant's Realm.