1: First uninstall the software when the trial period completes.
2: Go to Start –> Run and Type “Regedit”.
3: Then look for HK Local Machine -> Software -> Your Software name. Delete the Key.
Do this for HK Current user if there exists a key of that software.
4: Go to run type “%temp%. Delete all files. Well they are just temporary files so it won’t matter, it will only clean up your System little bit .
5: Go to Users -> Username -> Appdata Check all 3 directories that is “Local”, “LocalLow”, “Roaming” for your software entry. Delete that.
6: Reinstall the application and enjoy the next trial. Just perform this everytime when the trial period expires.