Did not make admin pages secure and now can't access them even when logged in as admin

When I first installed the module I made some pages secure, and in some browsers when navigating between secure & non secure pages was constantly getting a message saying some page elements were secure and others weren't; these turned out to be images in blocks. To resolve this I tried re-uploading the images, although found that the default setting of making admin/* pages secure broke the image upload when using blocks admin, so to resolve that problem I disabled Secure Pages for admin/* I then started getting the problems just raised in http://drupal.org/node/1950344 and cleared cache, and now even when I log in as admin, I get access denied when going to any admin pages. So I can't even disable the Secure Pages module or anything. Disaster! HELP!