Step 3: Wait for the installation to be completed, but don’t Run LG Flash Tool yet! Step 2: Next, install the Downloaded LG Flash Tool, hit next to proceed with the installation Step 1: Download the MegaLock.dll file and extract it to your system. Step 4: Uncheck the Run LG Flash Tool and click on Finish. Step 6: Navigate to the LG Flash Tool installation directory. Usually, you can find it under C:/ Drive.