Copy the files to a PC (or to Drive). Uninstall the recording app. Delete the folder on the SD card. Restart the phone. Install the recording app. You should be able to find the folder on the SD card - if not record a call, they you should be able to find it. (Call your voicemail, start recording, stop recording, hang up.) Now copy all the files you copied to that folder. The app should find them. If it doesn't, it's a little more complex (it depends on the app's developer) and you'll need the assistance of someone who can write SQL queries.