Saving an audio file for your computer is called “exporting” in Audacity. The Export command is in the File menu.
Audacity does not import or export DSS or DS2, but it can import WAV. Try Switch to convert DSS or DS2 to WAV: http://www.nch.com.au/switch/index.html. Switch cannot convert back to DSS/DS2 because DSS/DS2 are patented formats.
DS2 files are sometimes encrypted and if so, cannot be converted unless your recorder can save them as WAV. You can still play such a file on the recorder, then record it into Audacity, by connecting the recorder’s headphones or audio out to the computer’s audio input. If the computer has a blue line-in, try that instead of the microphone input.
Thanks ever so much, I will give it a try. I balked a little bit at the price of WavePad (NCH) just for what I need it for doesn’t really justify it, but I have a licence for Switch so that’s useful to get the instruction