SKTool gives you the option to disable today plugins
http://www.s-k-tools.com, SPB Pocket Plus provides a "safe mode" boot when it detects a problem booting
http://www.spbsoftwarehouse.com/products/pocketplus/?en. Both are "must have" apps so it may be worth making a purchcase to resolve current situation and have it for everyday use. If you are lucky, their trial version may get you out of trouble without £££