I bought windows 10 version, but the version is old and I can't update

 
 
Hello!
I wonder why the version for win 10 only goes up to 1.14.60. when I bought it, I thought it would have beta version 1.15 like Java. If it is impossible to obtain this version, I would like to know the possibility of switching to Java.
I made two purchases of this game for win 10.
Awaiting return