VMware Workstation 7 – the command-line utility „ovftool“ is bundled in the VMware Workstation installer. Use this tool along with VMware Workstation to convert VMware .ovf files to .vmx format or vice versa
Examples:
ovftool <OVF source folder\vmappliance.ovf> <OVF destination folder\vmappliance.vmx>
ovftool <OVF source folder\vmappliance.vmx> <OVF destination folder\vmappliance.ovf>