GAH. Do NOT delete the stuff in there. Trust me. I don't care if you need space. DO NOT TOUCH THE FILES IN HIDDEN STORAGE.
It's your ExtROM, and all links to it are hardcoded. This isn't like the Magician Bigstorage, where the links are recoded; Your PPC is tons slower because it's trying to find stuff that doesn't exist anymore. Like, say, your configs.
If you want those back, you have to reflash your device. No choice.
To the other side... and beyond. <_<
Galaxy S2 i9100 Chameleon 3.0.3 JB / Dorimanx 8.35
Ouya (stock rooted)
Liquid Community ROM 1.4 (Acer Liquid)
O2 XDA Atom WM6.1 Kuruma Final
HTC Touch Elf Opal Ultimate 3.2.1
LG KS20 Kiss20.4