Installing V7 issue

Wen to install v7 from the email and it immediately rebooted my pc which then wouldn’t reboot as it told me it needed repairing. Finally got it back after having to restore it from the last saved backup point. It now tells me to install which I am reluctant to do considering what just happened. Also why does it ask me if I want to Upgrade or continue using the free version when I already have a paid account