Can only save / export to 3dm file

I am still using a 2008 legal Education version
of Rhino. I just started to use it again after a year
or so and now I can only save / export to 3dm file.
Any help as to why this is happening would be
Thanks Ken

Your installation has been damaged. All of the other file import/export options are added as plug-ins. It sounds like those files have been deleted.
It’s hard to say what else might be missing.

I’d suggest uninstalling Rhino using the Control Panel tools.
Then re-install using a fresh installed downloaded from the Download page on the Rhino Web site.

Thank you , it worked…