Select your device from the list and look at the section at the bottom.
Use a patched version of LGUP.exe designed to bypass developer check-ins. Misaligned model configuration or corrupt firmware file.
: Necessary for Windows to detect the phone in Download Mode.
Point the "Bin File" section to your downloaded firmware and click Start . Safety Warning: Avoid Malware
: This is the specific DLL file you mentioned. It is often found in enthusiast communities like XDA Developers or via tools like LGUP DLL Download .