Tailgrids button ad

[Gmanprodev]

It says in the ReadMe that you can use the template free without any attributions or backlinks, however I can't remove the button ad for TailGrids at the bottom of the page. When I delete the code for it, it disappears locally, but when hosting it the button ad is still there even though I've removed it from the code.

Can you tell me how I can remove it permanently?