How can I delete old bank transactions not required.. I now can't reconcile

I am having the same problem. I accidentally clicked on the Smart Reconciliation banner and was transported to an unfamiliar  bank rec screen which will not allow me to "finalise" my bank reconciliation. The reason seems to be the old unused auto fed bank transactions as you have mentioned. I also have no icon to turn off smart reconciliation.  Its disappointing there were not more steps given to allow consideration of moving to smart rec before it actually appeared for good.