In this case we suggest you to uninstall the application and reinstall it.
Don’t forget to save your seed phrase as it will be needed to get access to your funds.

To uninstall the app on Windows - follow this path: C:\Users\*your-windows-username*\AppData\Local\Programs\atomic

Click on uninstall Atomic.

Then all you need to do is just re-install the latest version of the app. It helps in the most of the cases.