The 'targetConfigs' folder contains target-configuration (.ccxml) files, automatically generated based on the device and connection settings specified in your project on the Properties > General page. Please note that in automatic target-configuration management, changes to the project's device and/or connection settings will either modify an existing or generate a new target-configuration file. Thus, if you manually edit these auto-generated files, you may need to re-apply your changes. Alternatively, you may create your own target-configuration file for this project and manage it manually. You can always switch back to automatic target-configuration management by checking the "Manage the project's target-configuration automatically" checkbox on the project's Properties > General page.