The following section is only relevant to users of Keil MDK v5. It explains how to migrate from a uvprojx-based project file to the new Open-CMSIS-Pack csolution project file format.
The learning path Convert uvprojx-based projects to csolution explains how to import, convert, and build uvprojx-based projects in Keil Studio for VS Code . It also shows how to convert and build uvprojx-based projects on the command line.