diff --git a/repository/TiddlyWiki/Tiddler.class.st b/repository/TiddlyWiki/Tiddler.class.st
index 28ab1b0..ecdcb90 100644
--- a/repository/TiddlyWiki/Tiddler.class.st
+++ b/repository/TiddlyWiki/Tiddler.class.st
@@ -267,6 +267,12 @@ Tiddler >> gtTextFor: aView [
 		text: [ text ]
 ]
 
+{ #category : #testing }
+Tiddler >> hasUID [
+
+	^ self customFields includesKey: 'uid'
+]
+
 { #category : #accessing }
 Tiddler >> importFedWikiPage: pageViewUrlString [
 	| pageTitle pageViewUrl pageData |
@@ -302,7 +308,8 @@ Tiddler >> installTiddlerExporter [
 { #category : #testing }
 Tiddler >> isImage [
 
-	^ self type = 'image/'
+	^ self type ifNil: [ ^ false ];
+		beginsWith: 'image/'
 ]
 
 { #category : #testing }
diff --git a/repository/TiddlyWiki/TiddlyWiki.class.st b/repository/TiddlyWiki/TiddlyWiki.class.st
index 6486d2e..b18a4cf 100644
--- a/repository/TiddlyWiki/TiddlyWiki.class.st
+++ b/repository/TiddlyWiki/TiddlyWiki.class.st
@@ -25,9 +25,9 @@ TiddlyWiki class >> createFromRemote: aRemoteTWUrl in: aFolder [
 	aFolder hasChildren ifTrue: [ ^ nil ].
 	wiki := TiddlyWiki new 
 		remote: aRemoteTWUrl;
-		folder: aFolder;
-		file: (aFolder / 'index.html') ensureCreateFile.
+		folder: (aFolder ensureCreateDirectory).
 	^ wiki downloadHTML;
+		file: (aFolder / 'index.html');
 		tiddlers.
 ]
 
@@ -52,6 +52,33 @@ TiddlyWiki class >> fromJSONUrl: anUrlString [
 		 name: anUrlString
 ]
 
+{ #category : #accessing }
+TiddlyWiki class >> loadFromLocalFolder: aFolder [
+
+	| wiki |
+	wiki := TiddlyWiki new
+		folder: aFolder;
+		file: aFolder / 'index.html';
+		jsonFile: aFolder / 'tiddlers.json'.
+	^ wiki fromString: wiki jsonFile.
+]
+
+{ #category : #accessing }
+TiddlyWiki class >> loadFromLocalFolder: aFolder named: aName [
+
+	| wiki |
+	wiki := TiddlyWiki loadFromLocalFolder: aFolder.
+	^ wiki name: aName
+]
+
+{ #category : #accessing }
+TiddlyWiki class >> loadFromLocalFolder: aFolder named: aName withRemote: aRemoteURL [
+
+	| wiki |
+	wiki := self loadFromLocalFolder: aFolder named: aName.
+	^ wiki remote: aRemoteURL
+]
+
 { #category : #accessing }
 TiddlyWiki >> addRecentChangesToRepo [
 
@@ -181,7 +208,7 @@ TiddlyWiki >> downloadHTML [
 	localCopy := self folder / 'index.html'.
 	localCopy exists ifTrue: [ | timestamp |
 		timestamp := (DateAndTime now asString) copyReplaceAll: ':' with: '_'. 
-		localCopy renameTo: 'index', timestamp, '.html'].
+		localCopy renameTo: 'index-', timestamp, '.html'].
 	ZnClient new
 		url: htmlLink;
 		downloadTo: self folder / 'index.html'.
@@ -427,7 +454,12 @@ TiddlyWiki >> importJSONFile [
 { #category : #accessing }
 TiddlyWiki >> importJSONLink [
 
-	self jsonFile:  self folder / 'tiddlers.json'.
+	| localCopy |
+	self jsonFile ifNil: [ self jsonFile:  self folder / 'tiddlers.json' ].
+	localCopy := self folder / 'tiddlers.json'.
+	localCopy exists ifTrue: [ | timestamp |
+		timestamp := (DateAndTime now asString) copyReplaceAll: ':' with: '_'. 
+		localCopy renameTo: 'tiddlers-', timestamp, '.json'].
 	MarkupFile exportAsFileOn: jsonFile containing: self remoteTiddlersContentsString.
 	^ self fromString: self remoteTiddlersContentsString
 ]
@@ -795,6 +827,21 @@ TiddlyWiki >> tiddlersJSONUrl [
 	self remote ifNil: [^ nil].
 ]
 
+{ #category : #accessing }
+TiddlyWiki >> tiddlersMissingUID [
+
+	^ self tiddlers reject: [ :tiddler | (tiddler customFields includesKey: 'uid') or: [ (tiddler title beginsWith:'$') ] ].
+]
+
+{ #category : #accessing }
+TiddlyWiki >> updateFilesFromRemote [
+
+	self remote ifNil: [ self inform: 'No remote found. If you have one, please provide its URL.'.
+		^ self ].
+	^ self downloadHTML;
+		importJSONLink
+]
+
 { #category : #accessing }
 TiddlyWiki >> updateFromHtml [
 	self