Theme install failed error

[Hans (Support Admin)]

Installing Theme from uploaded file: Integral-Pro-v1.2.2-UNZIPME.zip

Unpacking the package…

Installing the theme…

The package could not be installed. The theme is missing the style.css stylesheet.

Theme install failed.

If you get the following error message when you install Integral Pro, it means you didn’t UNZIP the file.

The up-loadable theme file you need is located inside.

Simply decompress the file with a service like Winzip or Winrar.

[richard.boom]

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.

[Hans (Support Admin)]

To update your theme, follow these instructions http://support.themely.com/knowledgebase/how-to-update-your-theme/

You won’t loose your data.

Make sure to backup your site first.