diff --git a/lib/settingDefinitions.js b/lib/settingDefinitions.js
index ecb11c8..628ffdd 100644
--- a/lib/settingDefinitions.js
+++ b/lib/settingDefinitions.js
@@ -149,7 +149,7 @@
 		},
 		{
 			name: "storageVersion",
-			defaultValue: 0.2,
+			defaultValue: 0.3,
 			fixed: true
 		}
 	];
diff --git a/lib/settings.js b/lib/settings.js
index 36258e1..4d350e3 100644
--- a/lib/settings.js
+++ b/lib/settings.js
@@ -493,31 +493,42 @@
 
 				var urlSettings = {};
 
-				(oldStorage.blackList || "").split(",").forEach(function(url){
-					var entry = urlSettings[url];
-					if (!entry){
-						entry = {url, blockMode: "block"};
-						urlSettings[url] = entry;
-						newStorage.urlSettings.push(entry);
-					}
-				});
-				(oldStorage.whiteList || "").split(",").forEach(function(url){
-					var entry = urlSettings[url];
-					if (!entry){
-						entry = {url, blockMode: "allow"};
-						urlSettings[url] = entry;
-						newStorage.urlSettings.push(entry);
-					}
-				});
-				(oldStorage.ignoreList || "").split(",").forEach(function(url){
-					var entry = urlSettings[url];
-					if (!entry){
-						entry = {url, showNotifications: false};
-						urlSettings[url] = entry;
-						newStorage.urlSettings.push(entry);
-					}
-					else {
-						entry.showNotifications = false;
+				(oldStorage.blackList || "").split(",")
+					.filter(function(url){return !!url.trim();})
+					.forEach(function(url){
+						var entry = urlSettings[url];
+						if (!entry){
+							entry = {url, blockMode: "block"};
+							urlSettings[url] = entry;
+							newStorage.urlSettings.push(entry);
+						}
+					});
+				(oldStorage.whiteList || "").split(",")
+					.filter(function(url){return !!url.trim();})
+					.forEach(function(url){
+						var entry = urlSettings[url];
+						if (!entry){
+							entry = {url, blockMode: "allow"};
+							urlSettings[url] = entry;
+							newStorage.urlSettings.push(entry);
+						}
+					});
+				(oldStorage.ignoreList || "").split(",")
+					.filter(function(url){return !!url.trim();})
+					.forEach(function(url){
+						var entry = urlSettings[url];
+						if (!entry){
+							entry = {url, showNotifications: false};
+							urlSettings[url] = entry;
+							newStorage.urlSettings.push(entry);
+						}
+						else {
+							entry.showNotifications = false;
+						}
+					});
+				["whiteList", "blackList", "ignoreList"].forEach(function(list){
+					if (oldStorage.hasOwnProperty(list)){
+						newStorage[list] = "";
 					}
 				});