I have been unable to get the plugin up and running - it installs OK, but when I try and set up my electrum wallet with the plugin, choosing "Your Own Electrum Wallet" from the "Bitcoin Service Provider" dropdown doesn't make the "Electrum wallet's Master Public Key" available (as itsays it should do). I have attached a screenshot: http://kendamauk.com/screengrab.png
I have tried saving with as many options filled in as I can in the hope that it might appear but to no avail. I have tried it with Safari/OSX, Chrome/OSX and IE/Windows. I am using the latest version of the plugin, woocommerce 1.6.6 and wordpress 3.5
Any help appreciated!