You must be using 32 Bit Edition of both Microsoft Word & Internet Explorer in order to use Media Maker.
It is absolutely essential you do not install a 64Bit version of Office or Internet Explorer since 64Bit technologies do not support Active X. If you do Media Maker will not work anymore.
Active X is part of the Microsoft OLE (Object Linking & Embedding) Technology which has now been deprecated due to 64 Bit technologies.
Webdadi no longer supports Media Maker as a result of the above Microsoft deprecation. There is no replacement due to Microsoft's updated security models.
Please also ensure you add the location C:\Datography to your trusted locations list in the Options > Trust Centre Settings of Microsoft Word. Also you need to check the setting:- Trust access to the VBA Object Model.
So please Goto File>Options>Trust Centre Settings