I'm so glad to have you here and help you clarify things out,  Grace Lake.

Office 365 is supported as long as it is locally installed on your computer. That said, you still need to have it, you can either choose between 32 or 64 bit, or both. 

Once everything is good, I have articles here articles where you can find the detailed steps about installing the desktop version. Also, you'll want to see this video for visualization. Then, here's how to reinstall it.
 

Please get back here if you have other clarifications with QuickBooks. I'm right here anytime you need more help! Have a great day! Take care!