Multiple SolidWorks sessions

We have a user that is getting another instance of SolidWorks opening when double-clicking on a file when another session is already open. He would rather it not open another session. I have looked through the settings, uninstalled/reinstalled SolidWorks. How do I get it to not create a new session?


Windows XP 32bit
SolidWorks 2008 SP3

I had the same problem in the past while using another persons computer.
My problem was solved by going into the Windows Control Panel, click on " Mouse", and check to see if the "activate" setting is on "single" or "double" click.
Good luck, and I hope this helps.
Dean