ledeutsch:

I'm a newbie to midi stomp boxes. I've got my pitchfactor connected to my computer via USB, dumped the presets (all & current), opened FactorLib but can't find the .syx file that it's looking for

You should us FactorLib to download the presets ( File/Open from MIDI). If successful, they will appear on the program screen. Then, use File/Save to save them to your desired location.

The PF Dump command is for use with other applications such as MIDI sequencers – it won't in itself create a file.