It seems Captivate is corrupted. Do you have this also in a new project?
In that case refresh the Preferences folder. Close Captivate, Navigate to the folder Utils under the Captivate installation folder and execute the Clean... file that is appropriate for your OS. When reopening Captivate, a fresh Preferences folder will be installed in your profile (it is not labeled Preferences BTW) and hopefully you'll get the Advanced Actions dialog box back.
Lilybiri