diff --git a/README.md b/README.md
index fed1d8f..f98e721 100644
--- a/README.md
+++ b/README.md
@@ -99,7 +99,7 @@ instructions on obtaining a clientId.  OAuth requests from igv.js will include t
     * https://www.googleapis.com/auth/devstorage.read_only  - _if accessing protected Google Cloud Storage files_
     * https://www.googleapis.com/auth/drive.readonly - _if accessing files stored on Google Drive_
   
-* **Enabling shortening of shared URLs.** The property `urlShortener` (_optional_) is an object or function defining a URL shortener to shorten links created by the **Share** button.  The value of this property can be replaced with a function, taking a single argument (the long URL) and returning the shortened URL, or an Object. 
+* **Enabling shortening of shared URLs.** The property `urlShortener` (_optional_) is an object or function defining a URL shortener to shorten links created by the **Share** button.  The [tinyURL](https://tinyurl.com/app/) service can be configured by entering an api token in the field of the default configuration.  Other providers can be supported by setting the ```urlShortener``` property to an async function taking a single argument (the long URL) and returning the shortened URL. 
 
 ### Where to find the configuration files
 
@@ -115,6 +115,7 @@ var igvwebConfig = {
 
     genomes: "resources/genomes.json",
     trackRegistryFile: "resources/tracks/trackRegistry.json",
+    sessionRegistryFile: "resources/sessions/sessionRegistry.json",
 
     // Supply a drobpox api key to enable the Dropbox file picker in the load menus.  This is optional
     //dropboxAPIKey: "...",
@@ -124,10 +125,16 @@ var igvwebConfig = {
     // apiKey: "...",
 
     // Provide a URL shorterner function or object.   This is optional.  If not supplied
-    // sharable URLs will not be shortened .
-    urlShortener: {
-        provider: "tinyURL"
-    },
+    // sharable URLs will not be shortened.  If using tinyURL uncomment and supply an api token
+    
+    // urlShortener: {
+    ///    provider: "tinyURL",
+    //     api_token: "..."
+    //},
+
+    enableCircularView: true,
+
+    restoreLastGenome: true,
 
     igvConfig:
         {
@@ -137,19 +144,11 @@ var igvwebConfig = {
             queryParametersSupported: true,
             showChromosomeWidget: true,
             showSVGButton: false,
-            tracks: [
-	    // TODO -- add default tracks here.  See github.com/igvteam/igv.js/wiki for details.
-	    	// For example:
-                // {
-                //     name: "CTCF - string url",
-                //     type: "wig",
-                //     format: "bigwig",
-                //     url: "https://www.encodeproject.org/files/ENCFF563PAW/@@download/ENCFF563PAW.bigWig"
-                // }
-	    ]
+            tracks: []
         }
 
 }
+
 ```
 
 ### Track Registry
diff --git a/igvwebConfig.js b/igvwebConfig.js
index c6b575f..53e102b 100644
--- a/igvwebConfig.js
+++ b/igvwebConfig.js
@@ -6,16 +6,17 @@ var igvwebConfig = {
 
     // Supply a drobpox api key to enable the Dropbox file picker in the load menus.  This is optional
     //dropboxAPIKey: "...",
-    
-     // Supply a Google client id to enable the Google file picker in the load menus.  This is optional
+
+    // Supply a Google client id to enable the Google file picker in the load menus.  This is optional
     //clientId: "...",
     // apiKey: "...",
 
     // Provide a URL shorterner function or object.   This is optional.  If not supplied
-    // sharable URLs will not be shortened .
-    urlShortener: {
-        provider: "tinyURL"
-    },
+    // sharable URLs will not be shortened.  If using tinyURL supply an api token
+    //urlShortener: {
+    //    provider: "tinyURL",
+    //    api_token: "..."
+    //},
 
     enableCircularView: true,
 
diff --git a/js/shareHelper.js b/js/shareHelper.js
index 0be8e68..b5faa94 100644
--- a/js/shareHelper.js
+++ b/js/shareHelper.js
@@ -21,7 +21,7 @@
  *
  */
 import AlertSingleton from "./widgets/alertSingleton.js"
-import {bitlyShortener, googleShortener, tinyURLShortener} from "./urlShortener.js";
+import {bitlyShortener, tinyURLShortener} from "./urlShortener.js";
 import Globals from "./globals.js";
 
 let urlShortener;
@@ -33,13 +33,11 @@ export function setURLShortener(obj) {
         fn = obj;
 
     } else if (obj.provider) {
-        if ("tinyURL" === obj.provider) {
+        if ("tinyURL" === obj.provider && (obj.apiKey || obj.api_token)) {
             fn = tinyURLShortener(obj);
         } else if ("bitly" === obj.provider && obj.apiKey) {
             fn = bitlyShortener(obj.apiKey);
-        } else if ("google" === obj.provider && obj.apiKey) {
-            fn = googleShortener(obj.apiKey);
-        } else {
+        }  else {
             AlertSingleton.present(new Error(`Unknown URL shortener provider: ${obj.provider}`));
         }
     } else {
diff --git a/js/urlShortener.js b/js/urlShortener.js
index 822547d..55bf4dc 100644
--- a/js/urlShortener.js
+++ b/js/urlShortener.js
@@ -37,17 +37,50 @@ function googleShortener(apiKey) {
     }
 }
 
-function tinyURLShortener({endpoint}) {
-    endpoint = endpoint || "https://2et6uxfezb.execute-api.us-east-1.amazonaws.com/dev/tinyurl/"
+// function tinyURLShortener({endpoint}) {
+//     endpoint = endpoint || "https://2et6uxfezb.execute-api.us-east-1.amazonaws.com/dev/tinyurl/"
+//     return async function (url) {
+//         const enc = encodeURIComponent(url)
+//         const response = await fetch(`${endpoint}${enc}`)
+//         if (response.ok) {
+//             const shortened = await response.text()
+//             if (shortened.startsWith("<")) {
+//                 return url
+//             } else {
+//                 return shortened
+//             }
+//         } else {
+//             throw new Error(response.statusText)
+//         }
+//     }
+// }
+
+function tinyURLShortener({endpoint, apiKey, api_token}) {
+    endpoint = endpoint || "https://api.tinyurl.com/create"
+    const token = apiKey || api_token
     return async function (url) {
-        const enc = encodeURIComponent(url)
-        const response = await fetch(`${endpoint}${enc}`)
+        const response = await fetch(`${endpoint}?api_token=${token}`, {
+            method: 'post',
+            mode: "cors", // no-cors, *cors, same-origin
+            cache: "no-cache", // *default, no-cache, reload, force-cache, only-if-cached
+            headers: {
+                "accept": "application/json",
+                "Content-Type": "application/json",
+                // 'Content-Type': 'application/x-www-form-urlencoded',
+            },
+            body: JSON.stringify({url: url}), // body data type must match "Content-Type" header
+        })
         if (response.ok) {
-            return response.text()
+            const json = await response.json()
+            if (json.errors.length > 0) {
+                throw Error(json.errors[0])
+            } else {
+                return json.data["tiny_url"]
+            }
         } else {
             throw new Error(response.statusText)
         }
     }
 }
 
-export {bitlyShortener, googleShortener, tinyURLShortener}
+export {bitlyShortener, tinyURLShortener}
diff --git a/package.json b/package.json
index ad39bfe..fe3af8b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "igv-webapp",
-  "version": "1.14.0",
+  "version": "2.0.0",
   "description": "igv web app",
   "keywords": [],
   "author": "Douglass Turner and Jim Robinson",