Question: Why have the "save" and "open" functions on Maple 11 cease to work when I moved to Windows 7

I have been running Maple 11 since 2007.  Recently my PC was upgraded to Windows 7: upon reinstallation I appear to still have full mathematical functionality but can no longer save files. The "Open" button/menu are both equally unresponsive, although I can open old files by double clicking on them,

Please could you advise how I can resolve this issue.  Thank you.

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