I'm using the plugin's post function "Set Field Value to constant or Groovy expression"
by trying to copy a Groovy expression's value to a text field: return(currentUser.getDisplayName()).
In their latest major release, 5.0., this seems to work well but not on the older one (I have 4.0.7)
Can someone confirm that using the variable currentUser works in version 4 of the plugin?