We updated our licensing model to annual, subscription-based licenses starting March 1, 2014. Product keys that were issued prior to that will not activate recent versions of Office Timeline. Here are your options:
If you wish to install the version of Office Timeline for which you are licensed, uninstall the current build and install the older version of the product. You can download Office Timeline 2012 or Office Timeline 2013.
Alternatively, you can purchase an annual license from here: https://www.officetimeline.com/buy.
Attempting to activate a subscription version of the product with a non-subscription license will display an "Incompatible product key" error message.
Steps to Install the Licensed Version
Close all open instances of PowerPoint.
Use Control Panel to uninstall Office Timeline: Start > Control Panel > Programs > Uninstall a program > Office Timeline > Uninstall.
Check your original invoice to see the product for which you are licensed.
As of July 1st, 2015, Office Timeline 2012 Plus Edition and Office Timeline 2013 Plus Edition were declared End of Life (EoL).