That is the Digital ID you are referring to and not the Electronic Signatures.
The following link would give you the steps on how to delete the Digital ID.
The following link would give details on how to create a new one.
Hope this would help.
I have (2) digital ID's and would like to delete (1). When I click "remove ID" it asks for the password - which of course i do not have. Help!
I am using Acrobat XI pro.