
Do not, and I repeat, do not, download the latest Minecraft update through the Xbox app for PC—if you do, you may lose all of your worlds and everything you've worked so hard to build.
A recent Microsoft blog revealed a strange issue with the Xbox app for PC. It recommended that players run the Gaming Services Repair Tool for PC in the Xbox app before downloading the latest Minecraft update. Doing this updates the Gaming Services to version 19.87.13001.0 and resolves the lost world issue. Here's how to run the tool: