To change the countries that are on the drop-down list: 
  1. Browse to Contacts > Database Management > Field Management  > Assign Default Fields.
  2. Scroll down to Country and click the link Set Default (or the country abbreviation that is hyperlinked.)
  3. To remove countries from the list, click the country name under Values Displayed and then click >>Remove>>.
  4. To add countries to the list, click the country name under Values Not Displayed and then click <<Add<<.
  5. Click Save.
To edit or add a country not listed under Country Options: 
As of the 9.4.1 Release of Sphere happening on August 23rd, 2012, organizations can now choose which countries should appear in the Country drop-down menu of Billing Information. The steps to make this change are:
  1. Navigate to Communities > Special Events > Friends Asking Friends > Kintera Thon.
  2. Hover over the event and choose Website Info.
  3. Click on Website Features.
  4. Scroll down to the bottom to the Credit Card Options section.
  5. Select Accept transactions from each selected country. Transactions from all selected countries will be accepted, but AVS will only apply to transactions from the United States, Canada, and United Kingdom.
  6. Click Save.
  7. Click Publish This Event Now at the top of the Webinfo Checklist.
Note: When you select individual countries, Sphere only uses the address verification system (AVS) for transactions from the United States, Canada, and the United Kingdom.