Reconfiguring the System
Forced Reconfigure - Hidden Reset Button
You have the option of unconfiguring the IoTServer using the brute force method available with the reset button. This is talked about in the Reset Button Handling section of Hardware Details.
If you use the reset button to force a reconfigure, the global.xml file will be overwritten with one that only provides for a Data Engine. The configuration file created for the data engine will be defaultobjects.xml and it will contain only one data object. This will be a very minimal configuration, even more minimal than the "minimal" configuration originally shipped.
Forced Reconfigure - "Force Reconfig" Button on Web Page
You will find these two buttons at the bottom of the Task Configuration page. Force Reconfig means wipe out the databases, and reload everything from the XML files that are displayed for the various tasks within the task configuration page and task selections. After clearing out all of the existing databases, then click Reboot Device to force a reboot, at which time it will reload the databases from the XML files provided.
The more graceful approach to completely unconfiguring the IoTServer so you can start over is outlined here.