Welcome to the Community, @senator. I'm here to provide some details about managing your QuickBooks Desktop (QBDT) Pro 2019.

Yes, you can use your QBDT Pro 2019 even without getting updates or support from our Customer Care team. All you need to ensure is that the minimum requirements to run the program are achieved. To learn more, feel free to check this article: System requirements for QuickBooks Desktop 2019 and Enterprise Solutions 19.0.

I've also attached this helpful resource that you can access at any time to look for references and guides when performing your QBDT tasks: QBDT Help articles page. 

Please keep me posted if you have any other QuickBooks concerns. I'm always here ready to lend a hand. Have a good one. 

Thank you for that distinction because I am currently using Windows 10 and Microsoft is pushing Windows 11 more each day. In the event I do upgrade to Windows 11 or get a new PC, do you know if I can retrieve QBPro2019 from the website any longer? Thanks again for you timely and helpful message.

I don't know how long it will be available to download. Last I checked I could download older versions associated with my account. I think this link will take you to the page to log in: Your QuickBooks Account - Software HERE!