Hi & HELP! :) Lost pdf capabilites

Hi, everyone,
I have somehow lost my ability, in P&GD7, to export and open previously-created pdf files. It's not an "option" in the exprot drop-down. Where the heck did it go? I re-installed and it's still not there and I need it!
Thanks for any help. You are a great, helpful & creatvie bunch.
Jo :)

first thing to try is to open xpgd7 by right clicking and 'run as administrator'

That worked -- thank you SO much!! You're the best. Have a great day. :)
Jo :)