Happy New Year. The procedure is in the Jukebox pdf. Click the SD button on the left side, then the List button on the right. Assuming the unwanted tracks are all in the default playlist just multiple highlight the unwanted ones and click the delete button at the bottom.
The way to avoid the problem was first to multiple check in all the tracks back to Jukebox, edit the names, then multiple check out again to SD. By re-naming the Jukebox archive it effectively created different songs compared to the existing contents of the SD card, so they were checked out to be added.