In this article you can find out how you can get the latest version.
Browser Cache Clear
You will need to clear the cache of your browser.
Makecode version check
In Makecode's microbit editor you will have to go to the Javascript tab and scroll down to Explorer on the left side of the window. Expand the explorer to find pxt-fwd-edu. Check the version and hit the infinity icon to refresh the version.
Now you can go back to blocks to continue coding as this ensures you have the latest version.