Yes, you can, AZEmbroiderer.

It doesn't matter if you uninstall the previous desktop versions before installing the latest version. Just please make sure to save the backup copies of your company files on the computer's hard drive. 

To uninstall old QuickBooks Desktop versions:

1. Open the Windows Start Menu.
2. Search for Control Panel.
3. Select Programs and Features or Uninstall a Program.
4. Select the version of QuickBooks Desktop you want to uninstall.
5. Select Uninstall/Change and follow the onscreen instructions. If you don’t see this option, sign out and sign back in to Windows as an admin (or a user with admin rights).

Then, follow the steps in this link to help you install the QuickBooks Desktop.

In case you get unexpected crashes with QuickBooks, here are are some troubleshooting references to help you resolve them:

• Solutions for when QuickBooks stops working

• While working in QuickBooks, QuickBooks closes unexpectedly (crashes with or without an error)

• Reinstall QuickBook using clean install

I'll be here when you have other questions in installing QuickBooks. Have a great day!