I am trying to install a plugin for the first time. Others have installed on my site before me but they are uncontactable at present. How would they have done it as my site has no left hand dashboard panel and therefore no "add new" button under the "Plugins". I understand from installation instructions that I need this button to install things? e.g. http://www.viddler.com/explore/tipsandtricks/videos/6/
Is this common, what can I do??
Thanks in advance