Help! WooCommerce My Account page stuck in https redirect loop

I setup SSL on my site. I then selected the "Force secure checkout" option in WooCommerce. Because I wanted to secure other pages on my site (form submissions) I also activated the WordPress HTTPS plugin.

Yesterday I noticed that the My Account page (http://clickwp.com/my-account/) is stuck in a redirect loop. I've deactivated the WordPress HTTPS plugin and also the "Force secure checkout" option in WC. Unfortunately the page is still stuck in a redirect loop.

I have cloned my site to a dev server, switched to Twenty Twelve and deactivated all plugins except WooCommerce - http://dev.clickwp.com/my-account/. The problem is definitely WooCommerce-related because it goes away if I deactivate the plugin.

I've already contacted WooCommerce support but have just got through their 1st level response 20 hours later. Any suggestions?