ProRaw files are already demosaiced.
The optical correction data is included but not applied (it’s not a drama if dxo can’t take it into account).
It’s a pity not to be able to process all your files with the same software.
I take more and more photos with my smartphone, so Photolab could not be my main raw software (I use Lightroom, and dxo photolab as a preprocessor for dng when needed).
The ultimate quality of development is not what is needed here, it’s just being able to see the files and apply some dxo settings on it.