Okay, FTP into your site. Navigate to wp-content/plugins and remove the pagelines-customize folder entirely. Don't delete it. Just move it down to your local computer so that it's no longer present in the site.
Then, go to
and login. Go to the Account area and download the latest version of PageLines Framework. Unzip the zip file to your desktop. It will have a folder in it called "pagelines" (without the quotes).
Now via FTP, navigate to wp-content/themes and locate the pagelines folder. Remove it. Don't download it or move it down. This can be deleted. Once the removal is complete, upload the pagelines folder from your desktop to the same place. See if you can login.
Once we get that far, we can address the pagelines-customize plugin folder after.