There may be times when you need to modify the fields in your database after you've started your business. You can manage the fields in your member database through the
Setup->General Settings menu. Once there, click on the
"Manage Database Fields" submit button at the top of the page. The first section on the page looks something like:

This section contains all fields currently in your member database, and allows you to rename any field. The second section on this page allows you to add fields to your member database. Due to technical restrictions, there is no way to delete fields from the member database. Instead, you can only add and rename fields.
5.5.1 Update New Database Fields
After you have added new fields to your member database, you may want to specify a default value for the new field(s) for every member's profile. You can instantly update all member's profiles through the
Other->Perform Mass Action menu. Leave all fields on the first page blank to select all members in your database, and on the second page, select "Edit field in member database" as shown below.

On the third and last page, simply select the field in your member database you would like to update, and specify the desired value. Then submit the form, and all member's profiles will be instantly updated with the new value for the selected database field.