It comes with a manual, which explains 1) how to use it and 2) what format it spits out (WAV). However, the Rytm does not have a Wavetable OSC, so how exactly should this work? One key property of WT synthesis is the interpolation ("morphing") of waveforms that are contained in a wavetable, and I don't think that you could emulate this behaviour with the AR.
What I could think right now is that you could create a sample chain consisting of 120 single cycle waveforms (check out https://www.adventurekid.se) and have the LFO or an envelope step through it, but I am not sure how this would work with looping in order to get cyclic wave... Would sure be interesting to try out.
But of course, if anyone figures out how to use the WTs created with this tool inside the Rytm, please share!