Switch my Amazon Affiliate Product Api from 4.0 to 5.0

Requirement - knowledge of amazon affiliate program. Amazon recently updated their product advertising api from 4.0 to 5.0 and I need help migrating to the new version. Please let me know if you can help me out with this, how much you know about amazon affiliates and their product advertising api, how long it will take to migrate to the new version (5.0), and how much this will cost. Thanks.