If you don't like the new "favorite-icons" and want a more Terraria-Style look do this:

Step 1:
Go to Dark Mode UI\Content\Images

Step 2:
Delete the "Inventory_Back10" and "Inventory_Back17.png" files

Step 3:
Rename "Inventory_Back10 Old" to "Inventory_Back10"
and rename "Inventory_Back17 Old" to "Inventory_Back17