It really does not matter to us what exactly went wrong.
Most users here are able to extract some files 
But it’s easy to make a mistake that can go undetected for some time.
And it’s good it’s sorted out in the end.
D for Dragging footprints works quite nice for simple moves when there is a lot of room around it, but it does not work anymore for a footprint that is “locked in” by surrounding tracks. The best option is to make a selection of both the footprint and surrounding tracks and move them as a block. After the move you will have to fix the edges of the block.
Use the selection filter in the lower right corner of the screen, and turn on the checkbox before Footprints.
With a right-click in that window, you can also unselect all except the one you are pointing at.