sounds like your previous install and uinstall of OpenVPN left some registry keys behind....
if you're familiar with the windows registry and 'regedit' open it and look for
HKLM\Software\Openvpn-GUI
Uninstall openvpn 2.2.2 and the 'personalOpenVPN' software; then remove this entire registry set and then re-install openvpn 2.2.2