To upgrade your Comala Document Approval server product version please see: Updating Comala Document Approval to the Latest Version

Want to change between different products in the Comala Document Management Family of Apps? 

Please see our guide: Changing Between Different Apps in the Comala Document Management Family

Moving your Confluence instance from Server to Cloud? 

We have similar apps on the different hosting options.  But unfortunately there is currently no way to migrate your workflow history data or settings.