Go to the Play Store, search for Google Maps, tap the three dots, and un-check "Enable auto-update." If you forget this step, the Play Store will overwrite your extra quality version overnight.
Users looking for higher quality navigation should:
New map style for Google Maps Platform - Google for Developers
If you are looking for "Extra Quality" because you want better satellite imagery or offline maps, those features are already built into the standard free app . You can: Download Offline Maps: Tap your profile picture > Offline maps. Turn on Satellite View: Tap the "Layers" icon on the main map screen.