diff --git a/backend/srv.py b/backend/srv.py
index 711e099..b1bae77 100644
--- a/backend/srv.py
+++ b/backend/srv.py
@@ -9,7 +9,7 @@ class RequestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
         SimpleHTTPServer.SimpleHTTPRequestHandler.do_GET(self)
         # RequestHandler, self).do_GET()
 
-httpd = BaseHTTPServer.HTTPServer(('0.0.0.0', 4443), RequestHandler)
+httpd = BaseHTTPServer.HTTPServer(('0.0.0.0', 4445), RequestHandler)
 httpd.socket = ssl.wrap_socket (httpd.socket, certfile='/pstore/home/adaszews/workspace/arvados-workbench-advanced/backend/server.pem', server_side=True)
 httpd.serve_forever()
 
diff --git a/frontend/src/js/dialog/wb-browse-dialog-collection-content.js b/frontend/src/js/dialog/wb-browse-dialog-collection-content.js
index e2a1d98..b7131d5 100644
--- a/frontend/src/js/dialog/wb-browse-dialog-collection-content.js
+++ b/frontend/src/js/dialog/wb-browse-dialog-collection-content.js
@@ -73,9 +73,9 @@ class WBBrowseDialogCollectionContent extends Component {
     const numPages = Math.ceil(listing.length / itemsPerPage);
     const rows = listing.slice(page * itemsPerPage,
       (page + 1) * itemsPerPage).map(it => [
-      ((it[0] === 'd' && selectWhat === 'directory') ||
-        (it[0] === 'f' && selectWhat === 'file')) ?
-        makeSelectionCell(collectionUuid + collectionPath + '/' + it[1]) :
+      ((it[0] === 'd' && [].concat(selectWhat).indexOf('directory') !== -1) ||
+        (it[0] === 'f' && [].concat(selectWhat).indexOf('file') !== -1)) ?
+        makeSelectionCell(collectionUuid + collectionPath + '/' + it[1] + (it[0] === 'd' ? '/' : '')) :
         null,
       it[0] === 'd' ? (
         <a href="#" onclick={ e => {
diff --git a/frontend/src/js/dialog/wb-browse-dialog-collection-list.js b/frontend/src/js/dialog/wb-browse-dialog-collection-list.js
index 9b26ab6..0536cb1 100644
--- a/frontend/src/js/dialog/wb-browse-dialog-collection-list.js
+++ b/frontend/src/js/dialog/wb-browse-dialog-collection-list.js
@@ -21,7 +21,7 @@ class WBBrowseDialogCollectionList extends Component {
   prepareRows(items) {
     const { navigate, selectWhat, makeSelectionCell } = this.props;
     return items.map(it => [
-      (selectWhat === 'directory' ? makeSelectionCell(it.uuid) : null),
+      ([].concat(selectWhat).indexOf('directory') !== -1 ? makeSelectionCell(it.uuid + '/') : null),
       (
         <a href="#" onclick={ e => { e.preventDefault();
           navigate('/browse-dialog/content/' + it.uuid + '////'); } }>{ it.name }</a>
diff --git a/frontend/src/js/dialog/wb-browse-dialog-project-list.js b/frontend/src/js/dialog/wb-browse-dialog-project-list.js
index fe0294a..641db66 100644
--- a/frontend/src/js/dialog/wb-browse-dialog-project-list.js
+++ b/frontend/src/js/dialog/wb-browse-dialog-project-list.js
@@ -21,7 +21,7 @@ class WBBrowseDialogProjectList extends Component {
 
   prepareRows(items) {
     const { navigate, selectWhat, makeSelectionCell } = this.props;
-    return items.map(it => (selectWhat === 'owner' ? [ makeSelectionCell(it.uuid, 'project') ] : []).concat([
+    return items.map(it => ([].concat(selectWhat).indexOf('owner') !== -1 ? [ makeSelectionCell(it.uuid, 'project') ] : []).concat([
       (
         <a href="#" onclick={ e => {
           e.preventDefault();
@@ -86,8 +86,8 @@ class WBBrowseDialogProjectList extends Component {
   render({ app, navigate, page, selectWhat }, { numPages, rows }) {
     return (
       <div>
-        <WBTable columns={ (selectWhat === 'owner' ? [''] : []).concat(['Name', 'UUID']) }
-          headerClasses={ selectWhat === 'owner' ? ['col-sm-1', 'col-sm-4', 'col-sm-4'] : [] }
+        <WBTable columns={ ([].concat(selectWhat).indexOf('owner') !== -1 ? [''] : []).concat(['Name', 'UUID']) }
+          headerClasses={ [].concat(selectWhat).indexOf('owner') !== -1 ? ['col-sm-1', 'col-sm-4', 'col-sm-4'] : [] }
           rows={ rows } />
 
         <WBPagination numPages={ numPages } activePage={ page }
diff --git a/frontend/src/js/page/wb-launch-workflow-page.js b/frontend/src/js/page/wb-launch-workflow-page.js
index 22f668a..60720ed 100644
--- a/frontend/src/js/page/wb-launch-workflow-page.js
+++ b/frontend/src/js/page/wb-launch-workflow-page.js
@@ -25,10 +25,10 @@ function encodeURIComponentIncludingDots(s) {
 
 function inputSpecInfo(inputSpec) {
   const isFile = (inputSpec.type === 'File' || inputSpec.type === 'File[]' ||
-    (inputSpec.type.type === 'array' && inputSpec.type.items === 'File'));
+    (inputSpec.type.type === 'array' && [].concat(inputSpec.type.items).indexOf('File') !== -1));
 
   const isDirectory = (inputSpec.type === 'Directory' || inputSpec.type === 'Directory[]' ||
-    (inputSpec.type.type === 'array' && inputSpec.type.items === 'Directory'));
+    (inputSpec.type.type === 'array' && [].concat(inputSpec.type.items).indexOf('Directory') !== -1));
 
   const isArray = (inputSpec.type === 'File[]' || inputSpec.type === 'Directory[]' ||
     inputSpec.type.type === 'array');
@@ -36,11 +36,11 @@ function inputSpecInfo(inputSpec) {
   return { isFile, isDirectory, isArray };
 }
 
-function uuidsToCwl(obj, isFile) {
+function uuidsToCwl(obj) {
   if (obj instanceof Array) {
-    const res = {};
+    const res = [];
     for (let k in obj) {
-        res[k] = uuidsToCwl(obj[k], isFile);
+        res[k] = uuidsToCwl(obj[k]);
     }
     return res;
   }
@@ -49,9 +49,11 @@ function uuidsToCwl(obj, isFile) {
     (/^[0-9a-z]{5}-[0-9a-z]{5}-[0-9a-z]{15}/.exec(obj) ||
       /^[0-9a-f]{32}\+[0-9]+/.exec(obj))) {
 
+    const isDirectory = obj.endsWith('/');
+
     return {
-      'class': (isFile ? 'File' : 'Directory'),
-      'location': 'keep:' + obj
+      'class': (isDirectory ? 'Directory' : 'File'),
+      'location': 'keep:' + (isDirectory ? obj.substr(0, obj.length - 1) : obj)
     };
   }
 
@@ -66,8 +68,11 @@ function parseKeepRef(value) {
 
 class WBPathDisplay extends Component {
   fetchData() {
-    const { app, path } = this.props;
+    const { app } = this.props;
     const { arvHost, arvToken } = app.state;
+    let { path } = this.props;
+    if (path.endsWith('/'))
+      path = path.substr(0, path.length - 1);
     let m;
     if (m = /^[0-9a-f]{32}\+[0-9]+/.exec(path));
     else if (m = /^[a-z0-9]{5}-[a-z0-9]{5}-[a-z0-9]{15}/.exec(path));
@@ -157,7 +162,9 @@ class WBLaunchWorkflowPage extends Component {
       <button class="btn btn-outline-primary"
         onclick={ e => {
           e.preventDefault();
-          this.browseDialogRef.current.show(isFile ? 'file' : 'directory', isArray,
+          this.browseDialogRef.current.show(
+            [].concat(isFile ? 'file' : []).concat(isDirectory ? 'directory' : []),
+            isArray,
             v => {
               this.state.inputs[inputSpec.id] = JSON.stringify(v);
               this.setState({});
@@ -212,8 +219,7 @@ class WBLaunchWorkflowPage extends Component {
     for (let k in this.state.inputs) {
       try {
         let val = jsyaml.safeLoad(this.state.inputs[k]);
-        const { isFile } = inputSpecInfo(main.inputs.find(a => (a.id === k)));
-        val = uuidsToCwl(val, isFile);
+        val = uuidsToCwl(val);
         k = k.split('/').slice(1).join('/');
         inputs[k] = (val === undefined ? null : val);
       } catch (exc) {