Downloaded but won't open

Hello, this is my first time using Nomad. I’ve been trying to download so I can install the program. The file that downloads is “Unconfirmed 653830.crdownload”, I’m using windows and when I try to click on the file a window pops up asking what program do I want to use to open. I’ve never ran into this problem trying to install a program. Am I doing something wrong?

It’s not done downloading I think