Help! Theme not uninstalling!

[iPhone_hater]

I want to uninstall a theme my pre is running, problem is, even though the theme is clearly installed, I looked at my installed packages and the theme is not there. When I try to install a different theme it fails and i get this:
IPKG_OFFLINE_ROOT=/media/crytofs/apps /bin/sh /media/cryptofs/apps/usr/lib/ipkg/info/com.prethemer.themes.49c2fa951e.postinst 2>&1

I've restarted everything, luna, java etc and even tried to reinstall the theme I'm stuck with and it's not working, please help!