HOWTO: How do I back up ListPro on my iOS device if I have a Mac desktop?
ListPro's data is stored only on your device, and backed up into the iTunes backup along with everything else on your device. If you are only using Mac OS X, you can still manually back up your data, but you won't be able to access it on the Mac.
To back it up from the device:
To transfer your data back, you can email yourself the .CLF files as file attachments, and then open them in ListPro on the iPhone using the Mail app.
If you are familiar with third-party FTP software, you can use any FTP program to transfer your files back and forth. You cannot use the Finder to transfer files to your iPhone.