diff --git a/CHANGELOG.md b/CHANGELOG.md
index 64445d7..afcf5fb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+## [4.2.0b] - 2018-03-27
+### Changed
+Updated WilB's Library Tree to v1.401.
+
 ## [4.2.0a] - 2018-03-26
 ### Fixed
 Playlist Panel: fixed wrong scroll position on item refocusing.
@@ -237,7 +241,8 @@ Playlist Panel:
 ### Fixed
 - Fixed various crashes caused by incompatibility with JScript.
 
-[Unreleased]: https://github.com/theqwertiest/CaTRoX_QWR/compare/v4.2.0a...HEAD
+[Unreleased]: https://github.com/theqwertiest/CaTRoX_QWR/compare/v4.2.0b...HEAD
+[4.2.0b]: https://github.com/theqwertiest/CaTRoX_QWR/compare/v4.2.0a...v4.2.0b
 [4.2.0a]: https://github.com/theqwertiest/CaTRoX_QWR/compare/v4.2.0...v4.2.0a
 [4.2.0]: https://github.com/theqwertiest/CaTRoX_QWR/compare/v4.1.1...v4.2.0
 [4.1.1]: https://github.com/theqwertiest/CaTRoX_QWR/compare/v4.1.0...v4.1.1
diff --git a/theme/Scripts/Common.js b/theme/Scripts/Common.js
index 9687b67..6e1498a 100644
--- a/theme/Scripts/Common.js
+++ b/theme/Scripts/Common.js
@@ -5,7 +5,7 @@
 
 var g_theme = {};
 g_theme.name = 'CaTRoX (QWR Edition)';
-g_theme.version = '4.2.0a';
+g_theme.version = '4.2.0b';
 g_theme.folder_name = 'CaTRoX';
 g_theme.script_folder = 'themes\\' + g_theme.folder_name + '\\Scripts\\';
 
diff --git a/theme/Scripts/Panel_Library.js b/theme/Scripts/Panel_Library.js
index 047bc4d..0a7ca19 100644
--- a/theme/Scripts/Panel_Library.js
+++ b/theme/Scripts/Panel_Library.js
@@ -1,7 +1,7 @@
 // ==PREPROCESSOR==
 // @name "Library Tree"
 // @author "WilB"
-// @version "1.4"
+// @version "1.401"
 // ==/PREPROCESSOR==
 
 if (!window.GetProperty("SYSTEM.Chakra Checked", false) && !Date.now) {fb.ShowPopupMessage("Use the 'Chakra' script engine if possible (requires IE9 or later) - it's faster. Select in the JScript panel configuration window (shift + right click)", "Library Tree"); window.SetProperty("SYSTEM.Chakra Checked", true);}
@@ -1043,7 +1043,7 @@ function populate() {
         last_pressed_coord = {x: undefined, y: undefined}; lbtn_dn = false;
         if (y < p.s_h) return; var ix = this.get_ix(x, y, true, false); p.pos = ix; if (ix >= this.tree.length || ix < 0)  return this.get_selection(-1);
         var item = this.tree[ix], mode = x < Math.round(ui.pad * item.tr) + ui.icon_w + ui.margin ? 0 : this.check_ix(item, x, y, false) ? 1 : 2, xp = item.child.length > 0 ? 0 : 1;
-        if (!mode || sent) return;
+        if (mode != 1 || sent) return;
         if (v.k(2) && this.autoFill) return this.add(x, y, alt_lbtn_pl);
         if (!v.k(1)) {this.clear(); if (!item.sel) this.get_selection(ix, item.sel);}
         else this.get_selection(ix, item.sel); p.tree_paint();