How about Microsoft issuing a patch to fix this problem that they have created?
I see your problem now. Let me explain to you how things work. It's been explained over and over, but here it is again:
How can Microsoft possibly know what their updates are going to do to Calendar Creator? Microsoft doesn't have the software code for Calendar Creator, nor for
any program that they didn't write. So how is Microsoft supposed to know what to put in that patch you want them to issue?
Besides, why would Microsoft want to 'render your program unusable?' How is it in their best interests to have less software that can run on Windows? Microsoft doesn't have anything that competes with Calendar Creator.
The only people who have the code for Calendar Creator - or any application program - are the developers who wrote the program in the first place. Only the developers are in a position to maintain their software so that it continues to work with the changes
to an operating system. That's what it means when we say that software is 'supported.' It's a developer's responsibility to support their software. No one else can. And even if it were possible, let's say by industrial espionage, for Microsoft to lay their
hands on that code, they couldn't do anything with it, because it's the developer's legally protected intellectual property.
So if you want to vent you wrath at someone, get ahold of the developers who wrote your version of Calendar Creator and give 'em hell.
Demand that they update their code so it continues to work with Windows 10, and so no one has to pay for them for the latest version of Calendar Creator.