I was working in a file, and we had a power glitch and my system shut down (we don't have UPS's hooked up to our systems). The file I was working in is now locked. I can open a copy and rename it to another name, but I cannot do a save as to get the file back to it's original name, and I cannot delete the original file. I get the message "The action can't be completed because the file is open in another program. Close this file and try again." How do I close or unlock the file so I can delete it? I am using Solidworks 2015 on Windows 7 Professional.