A: You can force the iPlanner to download the presentations once more by holding your finger on the presentation you wish to re-download. A popup with the option to re-download full presentation will appear. This will replace the old files with the current files in the Manager.
Should all presentations be up to date but you still wish to download them again, the option to do so will be in under the Sync menu. Simply hold your finger on the check mark next to Presentations and the option to Force Sync or Check for Updates will appear.
In case this does not work, log out and log in again. This will make the iPlanner poll the server again if the iPad has access to the internet.