Usually the cause of this is that you installed on a pre-existing Outlook folder. You need to create a NEW root folder to install Calendar Browser-to.
Please delete the problematic Calendar Browser public folder/shared mailbox as well as the Calendar Browser file folder on the server and try with a new installation again on a new Outlook public folder/shared mailbox. Then you will get the full 30 day trial.
For full instructions on how to install Calendar Browser, please read the Administrator Manual or-watch the Installation demonstration.