You can uninstall the older versions for QuickBooks to delete them on your computer. I'm here to help guide you how.
Open the Windows Start Menu.
Search for "Control Panel" and open Control Panel.
Select Programs and Features or Uninstall a Program.
Select the QuickBooks Desktop (QBDT) version you want to uninstall in the list of installed programs.
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).
You may also check these articles for additional reference about uninstalling QuickBooks:
You have clicked a link to a site outside of the QuickBooks or ProFile Communities. By clicking "Continue", you will leave the community and be taken to that site instead.