Convert uvprojx-based projects to csolution
Introduction
Using Keil Studio
Using µVision
Using the command line
Next Steps
Convert uvprojx-based projects to csolution
Project conversion with µVision
In µVision, go to Project - Export - Save Project to csolution format:

The Build Output window will show a successful conversion:

You can now use the project with the CMSIS-Toolbox or Keil Studio.