i have a bug i dont can uninstall minecraft win 10 1.16 beta

Hey Minecraft team I have a bug... 

i dont can uninstalll minecraft 1.16 beta and than install miencaft 1.15.30

i dont wuld to uninstall when i can play miencarcft wihs 1.15 players please make the minecraft 1.16 fullversion FAAST or send me the 1.15 update