Be careful with File Explorer Extension, especially when navigating within a massive folder like \Windows\. I once tried listing Windows contents by file type. It set off a process that seemed like an infinite loop. Had to do soft reset, uninstall FEX. Still, it has nice features. If you'd like even bigger icons, then maybe try GS Finder Plus, my fave file navigator. It's finger friendly, has very powerful file association ability, good configuration possibilities, small memory footprint, and it's freeware.
Info re GSF+ is here:
http://tinyurl.com/62eshh