Aurender uses DoP (DSD over PCM) to send DSD files to DoP-compatible digital-to-analog convertors. Since DoP uses a PCM data stream, a DSD64 file will display at 176.4kHz, and a DSD128 file will display 352.8kHz on the Aurender Conductor app readout. Note that the receiving DoP-compatible DAC still reads the DSD file natively, as the PCM stream is simply acting as a transport for the original data.
For further information regarding DoP, refer to the following links:
http://www.dcsltd.co.uk/support/what-is-dop-dsd-over-pcm/
http://dsd-guide.com/dop-open-standard