The QB app has disappeared when I uploaded the new software the app disappeared. It's not very obvious how to get it back. How can I restore the app on my PC?

Good to see you here, @AYP,

If you're referring to the desktop app, you can reinstall it through this link: http://quickbooks.intuit.com/apps/. Scroll down to the Get the QuickBooks Mac or Windows App section and click Free Download.

This resolves any unexpected behavior on devices, and ensure updated security settings are downloaded. For mobile devices, install the app by visiting these links:

• Android app via Google Play.
• iPhone, iPad, and Apple Watch app via the iTunes App Store.
• Get the download link through SMS.

For quick access to mobile app resources, see this article: Mobile applications hub.

If the same thing happens, access your account temporarily on a supported browser.

I also recommend contacting our Phone Support Team, for them to open an investigation about this unexpected hitch and run some diagnosis to fix the problem.

To contact support:

1. Click the (?) Help menu at the top right section of your QBO Dashboard.
2. Tap the Contact us button.

Kindly update me on the result by adding a new comment below. The Community has your back and I'm here if you need further help. Have a good one!