diff --git a/repository/TiddlyWiki/TWSeed.class.st b/repository/TiddlyWiki/TWSeed.class.st
index 35a35ea..15d5345 100644
--- a/repository/TiddlyWiki/TWSeed.class.st
+++ b/repository/TiddlyWiki/TWSeed.class.st
@@ -26,6 +26,34 @@ TWSeed class >> deleteWikiFileFromFolder: folder andSubfolder: shortName [
 	^ file ensureDelete.
 ]
 
+{ #category : #accessing }
+TWSeed class >> initialize [
+
+	super initialize.
+	list := OrderedCollection new.
+	list 
+		add: (self new 
+			name: 'ProjectifyMod';
+			demo: 'https://mutabit.com/repos.fossil/tiddlywiki/uv/seeds/projectify/projectify-mod.html');
+		add: (self new
+			name: 'Wikilexias';
+			demo: 'https://mutabit.com/repos.fossil/tiddlywiki/uv/seeds/wikilexias/wikilexias.html');
+		add: (self new
+			name: 'NotebookMod';
+			demo: 'https://mutabit.com/repos.fossil/tiddlywiki/uv/seeds/notebook/notebook-mod.html');
+		add: (self new
+			name: 'Grafoscopedia';
+			demo: 'https://mutabit.com/repos.fossil/grafoscopedia/uv/');
+		add: (self new
+			name: 'Holonica';
+			demo: 'https://mutabit.com/repos.fossil/holonica/uv/');
+		add: (self new
+			name: 'Krystal Whitespace';
+			demo: 'https://krytsal-whitespace.tiddlyhost.com/').
+	^ self
+	
+]
+
 { #category : #accessing }
 TWSeed class >> install: seedName into: folder as: shortName [
 
@@ -63,6 +91,12 @@ TWSeed class >> list [
 		
 ]
 
+{ #category : #accessing }
+TWSeed class >> preview: wikiSeedName [
+	
+	WebBrowser openOn: (self selectSeed: wikiSeedName) demo.
+]
+
 { #category : #accessing }
 TWSeed class >> selectSeed: aSeedName [
 
@@ -81,31 +115,6 @@ TWSeed >> demo: anUrl [
 	demo := anUrl asZnUrl
 ]
 
-{ #category : #accessing }
-TWSeed >> initialize [
-
-	super initialize.
-	list := OrderedCollection new.
-	list 
-		add: (self class new 
-			name: 'ProjectifyMod';
-			demo: 'https://mutabit.com/repos.fossil/tiddlywiki/uv/seeds/projectify/projectify-mod.html');
-		add: (self class new
-			name: 'Wikilexias';
-			demo: 'https://mutabit.com/repos.fossil/tiddlywiki/uv/seeds/wikilexias/wikilexias.html');
-		add: (self class new
-			name: 'NotebookMod';
-			demo: '');
-		add: (self class new
-			name: 'Grafoscopedia';
-			demo: '');
-		add: (self class new
-			name: 'Holonica';
-			demo: '').
-	^ self
-	
-]
-
 { #category : #accessing }
 TWSeed >> name [
  ^ name
@@ -121,3 +130,10 @@ TWSeed >> preview: anObject [
 	
 	^ demo := anObject
 ]
+
+{ #category : #accessing }
+TWSeed >> printOn: aStream [
+super printOn: aStream.
+	aStream
+		nextPutAll: '( ', self name, ' )'
+]
diff --git a/repository/TiddlyWiki/Tiddler.class.st b/repository/TiddlyWiki/Tiddler.class.st
index 33998e2..b43d106 100644
--- a/repository/TiddlyWiki/Tiddler.class.st
+++ b/repository/TiddlyWiki/Tiddler.class.st
@@ -48,7 +48,7 @@ Tiddler >> asDictionary [
 		at: 'title' put: self title;
 		at: 'text' put: self text;
 		at: 'created' put: self created;
-		at: 'tags' put: self tags;
+		at: 'tags' put: self tags asArray;
 		at: 'type' put: self type;
 		at: 'creator' put: self creator;
 		at: 'modifier' put: self modifier;
@@ -479,7 +479,7 @@ Tiddler >> revision: aNumberString [
 { #category : #accessing }
 Tiddler >> tags [
 
-	^ tags
+	^ tags ifNil: [tags := Set new]
 ]
 
 { #category : #accessing }