To find an export template: 

1. Click on Setup  > Templates > Export from the top menu
2. Locate the Search box
3. Type part of the name of the template you a searching for
4. Click on the Find icon

To delete an export template:

1. Click on Setup  > Templates > Export from the top menu
2. Find the template
3. Click on the name of the template in the first column
4. Click on the Delete button at the bottom of the form