What's new in the latest version?
Try to restart computer. If it does not help, try open RemovePackageSignature in the Extra folder in the DMG bundle.
XtraFinder did not automatically start after installing.
Please launch it from Applications folder.
How to get XtraFinder's Menu Bar icon back?.
"Show in Finder" stops working.
Open Activity Monitor app and Force Quit "appleeventsd" process.
This is a problem of OSX 10.8.2. Restaring Finder (when installing XtraFinder) makes it has higher chance to happen.
I got message "XtraFinder Beta has expired!".
Please download the latest version, run Uninstall.app and reinstall again.