Install Theme

Hi,

I was testing an existing Highend theme( that I purchase last year) to replace an old theme from another company. I already own 2 versions that are in production and just purchased a third(today) that I want to use. I can’t install the new theme because it’s was already installed while I was testing. How can I just move the new license key into the domain since I can’t overwrite the old highend theme because it’s already installed:
Unpacking the package…

Installing the theme…

Destination folder already exists. /home/pikefis1/public_html/empire1homeimprovements/test/wp-content/themes/HighendWP/

Theme install failed.

Thanks for your help