the free trail installer is a quick way to install Postgres, Tomcat and Thingworx including the MFG apps.
The setup routine tries to install Postgres on the default port 5432, if this is not working the setup will be canceled. The port 8080 is using for Tomcat. When you use the installer you have to make sure that both ports are free and not blocked.
If you install Thingworx manually you have the option to change the ports. You can download the MFG apps extension and import them in Thingworx foundation to get the same functionality like the installer is automatically configuring.