ezt találtam:
"I found out a way. What you do is, 1st backup all your apps using Carbon to your Internal or External storage. Copy all the files in the carbon folder where you have backed up your data. Once you finish wiping your data, install all the apps again and backup using carbon. Now,replace these backup files with the actual backups ! Since you have backed up after re-installing your ROM , carbon won't say it couldn't find any backups. "