I constantly neglect my personal WordPress, then once I get back to it and hit all the magic update buttons I normally break something. I have learned the best way to manually disable a plugin when you can no longer get to your site is by using your hosts phpMyAdmin to manually edit your database entry to disable all plugins. Then you can go to your admin and remove the bad plugin and re-enable the ones that are working.

If you have a plugin error all of your pages will load to just a text error saying there is an error in “/home/myaccount/public_html/wp-content/plugins/XXX/XXX.php on line #123″.

If you get this login to your host an access your phpMyAdmin or other mySQL database editor.
USE AT YOUR OWN RISK!

1. Open the Database for wordpress
2. Open the wp_options table
3. Click on the Browse menu
4. Search through the pages for the “active_plugins” option (was page 2 for me)
5. Clear out the text the shows: “a:3:{i:0;s:39:”easy-adsense-lite/easy-adsense-lite.php”;i:1;s:49:”google-xml-sitemaps-v3-for-qtranslate/sitemap.php”;i:2;s:19:”jet”pack/jetpack.php”;}”
6. All your plugins will now be disabled, try to login and update your plugins as needed.