Appropriate program: LPG is a file extension associated with Lowrey Organ Registration files. Incorrect associations are the cause of many file extension errors. Scan your system to prevent, identify and repair LPG file extension association errors.ecommendations for file extension LPG users: 1  Performance: To optimize memory and CPU usage for LPG files run a free performance scan. 2  Stability: Fix LPG errors to make your system and applications more stable. 3  Drivers: Scan your PC for the outdated drivers which lead to system errors and slowdowns.