Problems uninstalling Ultra Sabers Obsidian Launcher

[NovaSitori]

I installed the v2.2.2 version of the Obsidian Launcher on 11/30/13, now I can't delete it. It's screwing around with my lsu files so that they don't show up in the v3.1.4 launcher. I don't know how to uninstall it. Every time I try I get this "Could not open logfile 'C:\Program Files (x86)\obsidianusb\ST6UNST.002' Can someone please help me?