I am using Search Builder to make custom searches. I want to search on a Membership field "Payment Method". After entering the operator = normally a small box appeared with a drop-down of the various options (cash, cheque, Direct Debit, etc.) from which I selected the desired option. This has worked fine for me in the past, however yesterday in my haste I accidentally entered a number in the window before selecting the option. Now I can't get the options back. All that comes up is the erroneous number and several other things I have tried.
How do I get my options back? Seems like a cache issue, but I haven't a clue what to clear. I've tried different browsers on my local machine, but it must be something in CiviCRM.
CiviCRM 4.6.24, Drupal 7