We use dcraw to decode RAW image files, the full list of supported camera models can be found here.
You can check your RAW files are supported using the free trial of PortraitPro Studio from portraitpro.com/downloadstudio.
If you find your particular RAW format is not decoded correctly, your alternative solution is to process your files into Adobe RAW using the free Adobe converter for this.
The Windows download is here:
and Mac one here:
With this you can convert all of your RAW files into the common Adobe RAW DNG Digital Negative format. You will lose no information from the files in doing this, but the resulting DNG files will load into many more programs correctly including PortraitPro Studio and Studio Max.
If this has not answered your question, open a support ticket to submit a question to our support staff.