As of 19th June 2015, Nintex Workflow for SharePoint versions 18.104.22.168, and 22.214.171.124 are now available (English and International).
To access the new builds, head on over to Product Downloads (This area is only accessible for Software Assurance, and Premium Support customers. If you don't have permission to this area, please Ask Support.)
Read up on the release notes here:
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