Workflow-ng 2.0, which was just released a few weeks ago, changed its menu paths. admin/workflow-ng/configurations is correct only for Workflow-ng 2.0. admin/build/workflow-ng is correct for Workflow-ng 1.6, which is the version used to develop Ubercart. I'm personally sticking with 1.6 for a while, because Workflow-ng has so many "quirks" that it's too risky IMO to go with the latest version until it's had its kinks worked out.

I hope that's the extent of changes that Übercart will have to account for if we start supporting the latest version of Workflow-ng.

Thanks for pointing this out, Tom, and thanks for the explanation, TR. I'll bookmark this post for whenever we do feel safe moving to workflow-ng 2. We may just have to support both paths somehow.