Cannot uninstall skin from XDA. Need help plz! (No Root)

Hey guys so I downloaded and installed a gingerbread theme from the XDA forums and I have tried every way possible of uninstalling it. My phone is not rooted and it is said that the theme would work with the droid incredible 2 when it is unrooted. It did work but did not look good and I am trying to take it out of my skins list. Thanks!

Methods Used: 1) I went to the skins list, pressed menu, and did not see a delete option only panel
2) Used a file manager, went to system, then app, and could not find the gingerbread.apk, I did see the stock skins though which was weird

This is what I did through looking on the web thoroughly and noten has worked. It's almost as if the gingerbread.apk is invincible, can only see it in the downloads.