I have .wpost files that I created, opened and updated with Windows Live Writer

I updated my computer.  I don't have Windows Live Writer

I was able to download Open Live Writer.  I am able to retrieve posts from my blog

How can I open .wpost files, local posts that I haven't uploaded?  Can I use Open Live Writer?

When I try to open them it gives me the option of Adobe, Internet Explorer, Microsoft Office Word, Microsoft Office Picture Manager, Notepad, Paint, VLC Media Player, Windows Media Player, and Wordpad

I looked in Windows Store.  It didn't find anything.  Open Live Writer doesn't show up as an option

How do I open local posts that haven't been uploaded?