Destination Folder already exists?

Hey l7network,
If I understand correctly, you are trying to upload the newest version of Enfold though the WordPress > themes > add new option?
This will not work to update the theme, We can help, but let me ask if you are using a child theme?
When you refer to the developer customizing the theme, do you believe that core theme files were edited, or were the theme options used to customize your site? Such a colors, font formatting, general layout, images?

If you are using a child theme and/or no core theme files were edited, then you can update your theme via FTP, basically you will, look for the “enfold” folder at /wp-content/themes/enfold/ and rename to “enfold-old” then upload the new version as the folder “enfold”
Please don’t try to overwrite the theme folder, as this will leave old files behind and cause errors.
Once you have cleared your browser cache and tested that your site is working correctly, you can delete the old folder “enfold-old”.
If for some reason you want to go back to the old version, simply remove the new folder and change the name of “enfold-old” back to “enfold”

I would also recommend first making a backup of your site with the tools your webhost provides.
Please let know if this helps, or if your situation is different, so we can assist further.

Best regards,
Mike

Hi,
Glad we were able to help, we will close this now. Thank you for using Enfold.

For your information, you can take a look at Enfold documentation here
For any other questions or issues, feel free to start new threads under Enfold sub forum and we will gladly try to help you :)

Best regards,
Mike