Hello I am trying to add an icon to the Fates Icon.Bch file. I used Bch Texture Tool to remove the existing icon files as PNG and gimp to add the edit in I want to the sheet, specifically a Dragonrune icon. However when I try to reinsert the edited sheets into the bch using Bch Texture Tool it corrupts the file. Please provide me with clear instructions on what to do (I have ADHD) I have no experience hacking.