I need license for Mailhub too. You can give it a try resetting the trial period with some reset tool such as : trial resetters which are open-source. Not sure that you will find any reliable for Mailhub but however, there are some working reset tools for sure. I have personally used to reset the trial period of other software and these tools are actually cleaning the registry so you can install the software again. However, be careful when downloading any tools since some might be harmful for your device. I prefer Vmware Workstation for testing them on virtual OS. Just my opinion.