But I did unzip.. and then tried to upgrade to the new Pro-version from 1.2.2 to 1.2.3 and I get this

Installing Theme from uploaded file: integral-pro.zip

Unpacking the package…

Installing the theme…

Destination folder already exists. /home/vanrhee1/domains/jrdb.nl/public_html/wp-content/themes/integral-pro/

Theme install failed.

Now what?
I am not happy with deleting all content from the server and then re-applying the upgrade.