Some trainers can accidentally bug your bomb inventory, making the game think you have 99 bombs when you actually have 0. This can break the bomb-crafting tutorial and force you to restart your save, so use these options carefully.
Renovating Constantinople is expensive. Hookblades, bombs, and brothels cost florins. The trainer allows you to freeze your currency value. Buy every shop, book, and weapon upgrade within the first hour of the game. Some trainers can accidentally bug your bomb inventory,
Ensure your trainer matches your game's executable. If you're on Steam or Uplay, your game version might be higher than v1.03, which can cause the trainer to crash the game.