Customized functionality in this application will not work...

You are seeing this issue:

This error is related to a setting for your computer, which disallows running Outlook add-ins that are based on a certain technology.

To enable running our add-in, please download the following archive, unpack it and execute the included file. It will ask you to accept the changes to your Windows registry.

Afterwards, please install our add-in. You can find more information on the setting in question here.