To uninstall it use the following steps:
1. Uncheck "Show at login".
2. Delete PCMonitor from /Applications
3. As superuser (sudo su -) :
launchctl remove com.mobilepcmonitor.PCMonitorHelper
rm -rf /Library/LaunchDaemons/com.mobilepcmonitor.PCMonitorHelper.plist
rm -rf /Library/PrivilegedHelperTools/com.mobilepcmonitor.PCMonitorHelper
rm -rf /var/root/Library/Application\ Support/PCMonitor/
The final 1.0 version will have an uninstaller.