Is calibre on microsoft store authored by this community?

Hello and thanks for awesome program.

I'd like ask if calibre on microsoft store https://apps.microsoft.com/detail/9N...hl=en-us&gl=US

Is actually this software. It states that developer is RequestRealEstate.

I don't see any references to MS store on calibre download page.
https://calibre-ebook.com/download

I actually wouldn't mind buying the paid version from MS store if I knew the money actually goes to developers who are working on it.

Thanks, Josef