1.Run Bucket Explorer as usual.
2.Choose Distribution icon from Bucket table toolbar or you can do same by selecting Manage Distribution option from right click menu option of any bucket.
3.It displays a List distribution window having list of already created distributions.
4.To update distribution select particular distribution from List distribution table and click on Update icon from toolbar of List distribution window.
5.It opens new window to update distribution having information about distribution as domain name, bucket name, status, Enabled/Disabled, CNAME and Comment associated with that distribution.
6.In this window you will see that Domain Name,Status,BucketName are not editable so that you can only update comment,Enable the distribution and CNAME(s).