Rebuild MPL
After creating a backup of your Quicken data file … To rebuild the Memorized Payee List from existing transactions, click Tools, hold down Shift and CTRL, then click Memorized Payee List.
Problem: Empty MPL List View or only a few entries show but File Information shows many MPL entries
Check the MPL view. Click on Options and make sure that there is NO checkmark on "Show locked items only"