Before installing the freemium app, did you already have a ThingWorx/PostgreSQL installation on your machine? If so, this could be the cause of the issue due to conflicts with ports, etc. The freemium version was designed for users who are not currently running ThingWorx and just want to check out the product. If ThingWorx is already installed on your machine, it is expected that you would be installing the Mfg extension, which requires a new license.
Please let me know if this does not help to resolve your issue so we can check further into your configuration, etc.