I downloaded desktop manager. It found QBDT Pro 2015 and 2018 (which is currently installed). My two options are "install" 2015" or "install info" next to 2018. When I follow the "install info" link, it says already installed, uninstall to reinstall. Not sure I want to do that at this point. Any suggestions? I realize I should have upgraded and will do so in the future, but don't want to at this moment.