You can delete data that has been learned and stored by the Intelligent Capture for AP engine by selecting a vendor from the Vendor Values table and clicking the Learned Data tab to display the two Learned Data tables: Learned Header Data and Learned Line Item Data.
From here, you can delete learned data (i.e., header and/or line item data) by vendor or Document Type, or you can delete all learned data for the currently selected ERP system: