How do I do that?
I just restored as new, 7.1.2 and Jailbroke before restoring from backup. Downloaded SwipeNav, still not working in Messages. Wtf??
Once you restore from backup, it brings over those plist files. When we say restore as new, it means NOT restoring a back up and only syncing content via iTunes and/or iCloud.
HenryLong suggested manually deleting the plist file for SwipeNav. I second this idea. If you use iFile, just make sure to empty the trash can if that option is enabled. After you delete the file, installing SwipeNav will be like the first time ever installing it. There will be no saved settings.
Either way, can't say for sure that it'll work in messages.
Also, just curious, but why do you need this to work in messages when you already have the stock feature of swiping back?