QB64-PE v4.2.0 is now available

[CookieOscar]

@doppler, I'm finally getting around to downloading this latest version of QB64PE and saw your upgrader program. 
Sorry if this is a dumb question, but what does this do exactly? 
I never needed a program to upgrade, I always just downloaded the new version of QB64 & QB64PE, 
and it just works with my programs made in the previous versions of QB64PE...
Thanks

The answer is in his post:

it saves me from individual compiling of dozens of programs.

You don't NEED to do this. But if you want, you can use his tool.
So, this also doesn't have anything to do with upgrading itself. It is just a tool to (re)compile lots of programs at the same time.