i can't get the item editor to work at all
Please follow the steps mentioned by the members Rjindael and Tachi in page 38. As a quick note below are the steps,
1) Open Item Box in any Bonfire after Majula.
2) Move any stackable item to the item box from your inventory. Make a note of the name of the item.
3) Alt+Tab to the trainer. From the Item id list available at multiple locations in this thread(one is available in the post just above your post) find the item id of the item you had moved to the item box. That needs to be entered in the current item id box.
4) Find the item id of the item you want and input it in the New Item Id field in the trainer. Also input the quantity of the item. Quantity for non stackable items(weapon/armor) should be 1 since inputting more quantity will crash the game. Click on Edit Item button.
5) Go back to the game. If the new item is a stackable item(like firebombs,etc) then go to the respective ITEM category tab(on top) and move the item from the item box to your inventory. No need to move the first moved item back to your inventory since it may crash due to incompatible category.
6)If the new item is a non stackable item like a weapon/armor, after moving the item as mentioned in step 5, click on the item in your inventory and select LEAVE to drop the item on the ground. After that pick it up again and repair the item at the blacksmith.
Hope the above helps you in your pursuit