Make sure you have a backup of your save file, always. Editing save game files may corrupt your save game rendering your save game unloadable.

FAQ
Question: The editor doesn't show names, just random numbers and letters?
Answer: The editor loads the names via the file cheatdata.json, which is in a subfolder called Bundles in the game installation folder. To make sure the editor knows where to load this file, go to Settings and set the game installation folder.

Question: The editor opens a port around 8000, why does it do that?
Answer:  The editor is built upon Electron, a framework to build crossplatform apps. It enables you to write all the UI in html and css without having to build different UI for different operating systems. Technically it works by hosting a webbserver on a port around 8000 and running the app in a built in browser. The app will only connect to the same computer running the app on that port.

Question: Can I add feats using the editor?
Answer: Export/import feats is released in 1.12.0, see article. Wiki with lists of feats can be found at https://arcemi.fandom.com/wiki/Feat_Codes

Special thanks/Contributors
Thanks to

• Evan Dixon for making you able to add new features from a searchable list among other things.
  

Installation
There are 4 files in this mod.

• Windows zipped setup file
• Windows zip archive
• Linux AppImage
• OSX dmg
  

For Windows

• Download the Windows zipped setup or zip archive
• Unpack the zip file
• Run the exe file you've unpacked
  

For Linux
To start of you need to unpack the app image, using e. g. 7-zip.
Then run the app image file.

For Mac OSX
To start of you need to unpack the dmg file, using e. g. 7-zip or any other unpacker that can unpack zip files.
Then run the dmg file.

IMPORTANT! Settings, game folder
Please configure the game installation folder. This will cause the editor to load some resources from the game and you will notice that many values in the editor will now show a readable text instead of a blueprint.
Some features will not work properly without this.

Screenshots
I haven't listed all the functionality here, please see the screenshots for more examples of what you can edit.

Army leaders
Note on army leaders. The base stats are in the save file, but the game will not recognize any changes to them. Stats are increased by leveling your army leader up.
You can add all level up feats by downgrading your army leader level after you level up similar to the character de-level trick below.

Inventory
I've restricted adding new items to simple items and usable items. Turns out weapons, armors and shields are very complex for named items and even +1 items.

To add weapons, armors and shields, add it to a vendor. Open the State page and select the Vendors tab. Find the vendor you want to add the items to and press the plus sign button.

From version 1.10.0 you can now edit enchantments on weapons and armors. You can edit the enchantment level, add and remove existing enchantments.

Source
The source code is available at Github:
https://github.com/jaygumji/ArcemiPathfinderKingmakerTools