[Plextalk] q. Can I go back?

I use a plextalk 2 and i think my software is 1.8. I don't know if I missed some update somewhere. Here's my dilemma: I recorded, we'll say, 5 songs. But in dealing with them, the second song was accidentally deleted; and some other things were done, so that I cannot use the "undo" command now. Can I correct the way that the Plex sees the songs to re-include song number 2? Or do I have to take this to Goldwave on my computer and extract Song Number 2 outside of the plex? Is there something I can do manually on the computer to force the plex to allow me to re-assign heading numbers and the like? I hope I'm making this question clear. Thanks so much. Penny (Golden) pengold2@gmail.com Old lady school marm in Eastern Nebraska