How to DELET bêta version Nether update withouth losing his World Android

Hello and sorry for beinge out of thé subject but i realy want help for that please if i DELET Minecraft for leaving thé beta version i am gonna lose my World and i just have 1 World survival i don't want to lose it i got very far please it's m'y best enjoying game 😭 i realy want help for that if you Can save 1 World just 1 for just deleting and download thé officielle version please realy want help (sorry for m'y m bad english) and thank you for help and answering