In this case we will be using a BRD4186C
radio board
On the subsequent screen select Empty C Project
This will create a regular Silicon Labs SLCP based project with no RF support nor any hardware dependency
It will bring in the minimum required to get started with a radio board
Click Next
Rename your project as you whish, ours will be BRD4186_HFRCO_Calibration
If you wish to, you can also set your project to copy all sources from the Gecko SDK locally upon configuration
This allows for easier versioning but complexifies import/export
Click Finish to proceed with project creation