If the Live Companion is not showing your games, please double-check that your summoner name and region are correct. Then, reset your file path, even if it looks correct. The gif below shows how to find these settings in the Mobalytics App. Click the '...' button underneath your file location and select the game folder again. Click 'Select Directory' after reselecting the game folder to complete this process.
The correct path should be ' C:\Riot Games\League of Legends ' by default.