Backup fails to create a normal .lzf file. It instead creates a file with the prefix "Unconfirmed" and the suffix ".crdownload." Downloads before 10/24 behaved normally. Windows 11 deletes the Unconfirmed downloads when the Hubitat app is closed.
Downloads of local backups exhibit the same behavior.
The browser wants you to ok the download at some point.
Hubitat doesn’t have a windows app 
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Are you referring to a web browser window/tab?
Which web browser are you using?
On Windows 11 when you open the Hubitat community page in Edge Browser, you get a popup to ask you if you'd like to "install Hubitat". Essentially, it puts the Hubitat icon on your desktop and launches the Hubitat community or UI in a vanilla windows with no browser tool bars. It "seems" like an app, but it's just the website in a window that doesn't have browser tool bars.
Yeap, this is what browsers do when you have a partially downloaded file that never completes or fails. You may need to confirm on a dialog box that the download is safe and you want to keep it, although I have never seen that happen for me. Microsoft protecting you from yourself.
Edge isn’t the only browser that does that. I do the same for Chrome.
Question for OP remains re: which browser they are using 
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Thanks! That did the trick.
Download the Hubitat app
