i'll work on a Nintex Solution with a few workflows to implement and our budget is limited.
A Nintex Workflow 2013 Workgroup Edition is enough now but if our users adopt this solution we may have some more work in the next months. So we will take a Workgroup Edition now because a standard one won't fit with our budget right now (the gap between the 2 versions is quite big).
In case the project successes and our users want more Nintex workflows, is it possible (and simple) to "migrate" from a Workgroup Edition to a Standard Edition (do we just have to change the licence key ?) ?