Well it seems that after installing that extension your layout was changed. I see in your head section that the template is using the modern theme instead of the hellojynxx theme. Check to make sure in System–>Configuration–>Design that the package and themes are set up according to your template. If they are set right, perhaps folders or files may have been overwritten on install and Magento can’t find them in the hellojynxx template folder, so it’s taking those missing files from the modern template.
If you change the settings and the problem persists (after clearing your cache) then post those settings here. You may have to give HT an ftp access to help you with this one since it involves another extension (which should work with the theme).