How do I replace this wood Icon? (With Screen shot)

[Marshmalo]

Hi there, I am trying to replace this wood item when you come to buy items at shop, there is a small tree Icon that I need to replace.

As you can see from the screen shot I've successfully replaced the upper tree icon but can't find which path the shop tree icon uses (I've circled it in pink)

http://www.hiveworkshop.com/forums/pastebin_data/qpszwb/Iron%20Ore.jpg

 

[SeriousEnemy]

Hey,

custom game interface -> picture - tooltip -> lumber icon

 

[Marshmalo]

Great thanks!