try this!
1. GO TO C:\AeriaGames\ AND COPY AVA FOLDER TO A USB OR EXTERNAL HDD OR TO ANOTHER DRIVE.
2. UNISTALL BY RUNNING "Uninst" FROM C:\AeriaGames\AVA.
3: GO TO START AND OPEN " Run ".
4: TYPE THE FOLLOWING IN RUN WINDOW " Regedit ".
5: OPEN THE FOLLOWING: "HKEY_LOCAL_Machine > SYSTEM > ControlSet001 > SERVICES > xHunter1"
6: DELETE FOLDER " xHunter1".
7. RESTART YOUR PC.
8. COPY BACK BACKED UP AVA FOLDER TO C:\AeriaGames\ (WITHOUT INSTALLING NOR DOWNLOADING THE GAME AGAIN)
9. LAUNCH NWZLauncher FROM AVA FOLDER.