The CLI exporter is working great for Keil exports. I would like to suggest that the field
<Cpu></Cpu>
in the generated .uvprojx file list the processor type during export. To use the free STM32 M0/0+ license the .uvprojx file must be modified as shown below or the compiler will not work with the free license. It will work with the full pro license in its current state with no issues:
<Cpu>CPUTYPE("Cortex-M0+")</Cpu>
I suggest it as the STM32 M0/0+ free Keil license is attractive to new users and this fix might not be immediately obvious to them.