AYY, THANK YOU FOR REACHING OUT!
Yes, when you purchase PAicom here on itch.io, you can download all the updates as they’re released!
Itch.io is just another platform where developers publish and sell their games and software.
(It’s like purchasing a game on the Epic Store! Still receiving all the updates when they’re released just like on Steam.)
So yes, you’ll absolutely receive the big update dropping in March! :3
However... cough cough the thing you’ve been waiting for will also be dropping in March on the platform you wanted wink wink
So be aware of that... even tho that's a secret winks with both eyes >w<