earlier I posted your raw opened in Raw/Digger and saved as RGB albeit as a 1/4 size JPEG. You could open that in DT and go from there …
Or I could give a link to a full-size PNG or TIFF.
Not sure that “open as” applies in this case. More like opening the raw in one app. then “exporting as” in a different format e.g. JPEG, PNG, etc.