diff --git a/pkg/branding/builds/builds.go b/pkg/branding/builds/builds.go
index d91cd26..d481df1 100644
--- a/pkg/branding/builds/builds.go
+++ b/pkg/branding/builds/builds.go
@@ -29,7 +29,7 @@ func init() {
 	} else if !dpp.Driver.IsRegistered() {
 		VersionSuffix = " (shareware)"
 	} else {
-		VersionSuffix = ""
+		VersionSuffix = " (registered)"
 	}
 
 	Version = fmt.Sprintf("v%s%s", branding.Version, VersionSuffix)
diff --git a/pkg/editor_ui_menubar.go b/pkg/editor_ui_menubar.go
index d9f9fe0..9ddae37 100644
--- a/pkg/editor_ui_menubar.go
+++ b/pkg/editor_ui_menubar.go
@@ -112,9 +112,11 @@ func (u *EditorUI) SetupMenuBar(d *Doodle) *ui.MenuBar {
 		levelMenu.AddItemAccel("Playtest", "P", func() {
 			u.Scene.Playtest()
 		})
-		levelMenu.AddItem("Publish", func() {
-			u.OpenPublishWindow()
-		})
+		if balance.DPP {
+			levelMenu.AddItem("Publish", func() {
+				u.OpenPublishWindow()
+			})
+		}
 
 		levelMenu.AddSeparator()
 		levelMenu.AddItem("Screenshot", func() {
diff --git a/pkg/plus/bootstrap/bootstrap_dpp.go b/pkg/plus/bootstrap/bootstrap.go
similarity index 93%
rename from pkg/plus/bootstrap/bootstrap_dpp.go
rename to pkg/plus/bootstrap/bootstrap.go
index 5e6c566..066a339 100644
--- a/pkg/plus/bootstrap/bootstrap_dpp.go
+++ b/pkg/plus/bootstrap/bootstrap.go
@@ -1,6 +1,3 @@
-//go:build dpp
-// +build dpp
-
 /*
 Package bootstrap is a common import between the Doodle and Doodad programs.
 
diff --git a/pkg/plus/bootstrap/bootstrap_foss.go b/pkg/plus/bootstrap/bootstrap_foss.go
deleted file mode 100644
index dd213f1..0000000
--- a/pkg/plus/bootstrap/bootstrap_foss.go
+++ /dev/null
@@ -1,14 +0,0 @@
-//go:build !dpp
-// +build !dpp
-
-package bootstrap
-
-import (
-	"git.kirsle.net/SketchyMaze/doodle/pkg/plus/dpp"
-)
-
-var Driver dpp.Pluggable
-
-func InitPlugins() {
-	Driver = dpp.Plugin{}
-}
diff --git a/pkg/plus/dpp/plugin.go b/pkg/plus/dpp/plugin.go
index 606d883..ebb2e14 100644
--- a/pkg/plus/dpp/plugin.go
+++ b/pkg/plus/dpp/plugin.go
@@ -8,9 +8,12 @@ import (
 	"git.kirsle.net/SketchyMaze/doodle/pkg/plus"
 )
 
+// Driver is the currently installed Doodle++ implementation (FOSS or DPP).
 var Driver Pluggable
 
-// Plugin
+// Pluggable defines the interface for Doodle++ functions, so that their implementations
+// can avoid cyclic dependency errors. Documentation for these functions is only spelled
+// out in the SketchyMaze/dpp package.
 type Pluggable interface {
 	LoadFromEmbeddable(string, filesystem.Embeddable, bool) (*doodads.Doodad, error)
 	IsRegistered() bool
diff --git a/pkg/plus/dpp/plus_foss.go b/pkg/plus/dpp/plus_foss.go
index f122399..87ddfa9 100644
--- a/pkg/plus/dpp/plus_foss.go
+++ b/pkg/plus/dpp/plus_foss.go
@@ -4,8 +4,6 @@
 package dpp
 
 import (
-	"errors"
-
 	"git.kirsle.net/SketchyMaze/doodle/pkg/doodads"
 	"git.kirsle.net/SketchyMaze/doodle/pkg/filesystem"
 	"git.kirsle.net/SketchyMaze/doodle/pkg/level"
@@ -13,8 +11,6 @@ import (
 	"git.kirsle.net/SketchyMaze/doodle/pkg/plus"
 )
 
-var ErrNotImplemented = errors.New("not implemented")
-
 type Plugin struct{}
 
 func (Plugin) LoadFromEmbeddable(filename string, fs filesystem.Embeddable, force bool) (*doodads.Doodad, error) {
@@ -30,11 +26,11 @@ func (Plugin) IsRegistered() bool {
 }
 
 func (Plugin) GetRegistration() (plus.Registration, error) {
-	return plus.Registration{}, ErrNotImplemented
+	return plus.Registration{}, plus.ErrNotImplemented
 }
 
 func (Plugin) UploadLicenseFile(string) (plus.Registration, error) {
-	return plus.Registration{}, ErrNotImplemented
+	return plus.Registration{}, plus.ErrNotImplemented
 }
 
 func (Plugin) IsLevelPackSigned(*levelpack.LevelPack) bool {