Hello there, Brian Blomefield.
I'm here to share some insights about downloading the app for Windows in QuickBooks Online.
The QBO apps for Windows are no longer supported as of April 20, 2021. You may go directly to this website: https://quickbooks.intuit.com/za/ and choose either to Buy now or a Free 30-day trial of the software.
You can check this article to learn more information about the QBO app for windows discontinuation in this article: QuickBooks Online Mac and Windows Desktop App Update.
If you have any other concerns, please add them in a comment below. I'll be right here to help.
