Once the activation key has been entered, the logo will disappear. In certain former versions, it may be necessary to republish the presentation. With this intention, it is enough to open the presentation, and in the File menu to choose to saving the publication on a local disc. By saving the presentation in another location, all of the pages will be regenerated and the logo "Demonstration" will be removed. If the saving is successful, you can thereafter remove the old publication from the computer and use the new presentation that was just saved.