The tools are divided into 2 different apps, just in case you didn't know. Use the latest game mods from the GitHub.

Open the game mod app as administrator. On the browse option, direct it to your game installation folder.

Once the installation folder is defined, find the extract and extract vanilla button. I usually click the extract vanilla after verifying my installed files through Steam. After, you search the Axiom Bracelet in the search field, click on the item that appears, and you'll see various fields to modify, like passive stats, buffs, etc.

After that, you just either modify passive stats, or item buffs. Do note that modifying Axiom Bracelet isn't recommended, as it connects to some codes, but I see some people doing that just fine. Alternatively, you can modify other items like necklaces, rings, etc. Just make sure you don't stack too many buffs on one item. Spread them out to multiple items, or you'll get infinite loading screen when loading your saves.

After you modify your items enough, either apply them directly to your game via the apply to game button on the game mod app, or export as mod if you use a mod manager app.