How do I change the generic folder icon in Yosemite 10.10.4?
I'm using Mac OSX Yosemite latest 10.10.5 and I've definitely sticked to the CandyBar app version 3.3.4 which is totally free from Panic inc.

I've been using CandyBar app since the Leopard days, the app works great until OS X 10.8 and "beyond", but now it is free and unsupported, so for OS X Mavericks / Yosemite etc. it might work with some hiccups. Nevertheless one can change icons for almost everything from system files to folders.