Editing fragment or layout outside of Sellerdeck

[pixelhaus]

I'm building a new V18 site and added some code into a fragment embedded into a template that causes Sellerdeck to crash upon starting. I want to either edit the fragment to remove the dodgy code or just remove it from the (footer) layout. I'd assumed I'd find the fragment in the database but I can't find it anywhere. Where should i look to find it ? TIA.

[NormanRouxel]

Fragments within the Brochure part of the site are in table BrochureFragments.

Fragments within the Section tree are in the Products table where the title is in sFragmentTitle and the description is in sFragmentText.