Articulate tab doesn't show on PowerPoint 2010 on 64-bit machine.
Recently we found that we could not get Articulate to show up on the menu bar of PowerPoint 2010. We installed, reinstalled, uninstalled, reinstalled until we were blue in the face. It would not show. This product worked on other 64-bit machines and 32-bit machines but not all.
We discovered that when our IT department installed MS Office on the new machines, they chose the 64-bit MS Office Suite as opposed to the 32-bit. This was the problem. Once we reinstalled MS Office 32-bit, then Articulate appeared on the toolbar with no more problems.
Hopefully this note helps others.