The new Atlassian App Migration Platform (currently under development) will enable all Atlassian Marketplace Partners apps to build automated migration paths for their apps.
When a customer migrates projects from Confluence Server / Data Centre to Confluence Cloud using the Confluence Cloud Migration Assistant, the app migration platform will coordinate with bitvoodoo to automatically move Navitabs - Tabs for Confluence data associated with the migrated spaces.
This migration path already works out of the. box. Please see https://wiki.bitvoodoo.ch/pages/viewpage.action?pageId=122301650 for instructions