In the Tone Editor, if you want to fetch the current Tone loaded on your JX-8P, press the "Fetch" button, then select the Tone to load on the JX-8P itself. The synth only sends out its current Tone information when you select a Tone.
Similar to fetching a Tone, fetching the saved Tone Bank from your JX-8P requires pressing buttons on the synth itself:
Like many other early Roland synthesizers, the JX-8P has the notion of Patches and Tones. Tones are what hold almost all of the actual information for a voice patch. Patches store additonal information: Assign Mode, Unison Detune, Pitch Bend, Bend LFO, Portamento mode and time, and Aftertouch.
Patch Base makes all of the Patch parameters available directly in the Tone editor. When you save a Tone to your iPad or Mac, Patch Base saves both the Tone and Patch data in a single file! So when you load this file, all of these settings will be sent to the JX-8P.
But, when you save a Tone to the JX-8P's memory, or when you fetch a Tone from the JX-8P, only the Tone data is used, not the Patch data! So please keep this in mind if you ever notice any differences in what you saved to the synth vs. what you first heard. The JX-8P offers no way to store Patch data from an external source (such as Patch Base). Only Tone data.