Install

Let's close all the processing programs in the End task menu,

This way, we can close the file and then open it again. All you have to do is press together Ctrl + Shift+ Esc on the keyboard. Then, in the Task Manager window, select the QuickBooks file. Click End task.

Afterward, you're good to update the file to the latest released. You can follow the steps shared by my colleague.

On the other hand, 64-bit refers to the Windows operating system. The supported Windows in QuickBooks Desktop Pro 2019 has 64-bit. Since your file has 32-bit, you may want to upgrade its operating system to meet the system requirements.

You can reach out to an IT Expert to help you update it.

I've also added this article for more information about the system requirements: QuickBooks Pro/Premier 2019 and Enterprise 19.0.

I'm just around if you still need help. Thank you!