You can go Back to Original Recovery by using the LG Mobile Updater
1. Download LG Mobile Updater (
http://www.lg.com/de/support/mc-supp...p?countryCd=de)
2. Install Mobile Updater
3. Remove Battery from the phone and plug it to the Computer while Holding Vol-Up Button. Display should now show S/W Upgrade
4. Start the Mobile Updater, if needed install USB-Drivers
5. In the Menu of the Mobile Updater choose Customer Service -> Emergency Repair
6. Enter the IMEI of your Phone when the Updater asks for it and click Check
7. The Phone gets now reflashed. All Partitions except the Data Partition will be reflashed.