"Hmm.  Now, when I try to run the installer as an administrator, it tells me I'm already running a more current version and won't reinstal..."

"Thanks for your reply.  I have already reinstalled it, but I'll give it one more shot in the hopes that does it."

"The problem isn't that the tab is missing - it simply refuses to do anything.  I can see and navigate to the tab, but none of the buttons..."

"I'm having an odd problem all at once.  When I got this computer (Win 8 and PPT 2013) I installed Studio 13 and it worked just fine.  Now..."