diff --git a/Casks/default-folder-x.rb b/Casks/default-folder-x.rb
index 57fba0c89718..7e9ebb1386bf 100644
--- a/Casks/default-folder-x.rb
+++ b/Casks/default-folder-x.rb
@@ -1,42 +1,22 @@
 cask 'default-folder-x' do
-  if MacOS.version <= :leopard
-    version '4.5.12'
-    sha256 'fc2225a106d0c26a4373d92e3a4b04483830506d22ec772b432a705a634c49ed'
-  elsif MacOS.version <= :mavericks
-    version '4.7.4'
-    sha256 '96cd688a099ec0ca3340d2e43d60f51513a2186a296346e7110c296ee00828e6'
-  else
-    version '5.1.3'
-    sha256 '2770531760efb3e8cc8ea58cc856b126fde117b54d2484470cca86dbc9516654'
-  end
+  version '5.1.3'
+  sha256 '2770531760efb3e8cc8ea58cc856b126fde117b54d2484470cca86dbc9516654'
 
   url "https://www.stclairsoft.com/download/DefaultFolderX-#{version}.dmg"
   name 'Default Folder X'
   homepage 'https://www.stclairsoft.com/DefaultFolderX/'
 
-  if MacOS.version <= :mavericks
-    installer manual: 'Default Folder X Installer.app'
-  else
-    app 'Default Folder X.app'
-  end
+  app 'Default Folder X.app'
 
   postflight do
     suppress_move_to_applications
   end
 
-  if MacOS.version <= :mavericks
-    zap delete: [
-                  '~/Library/Preferences/com.stclairsoft.DefaultFolderX.favorites.plist',
-                  '~/Library/Preferences/com.stclairsoft.DefaultFolderX.plist',
-                  '~/Library/Preferences/com.stclairsoft.DefaultFolderX.settings.plist',
-                ]
-  else
-    zap delete: [
-                  '~/Library/Application Support/.com.stclairsoft',
-                  '~/Library/Application Support/com.apple.sharedfilelist/com.apple.LSSharedFileList.ApplicationRecentDocuments/com.stclairsoft.defaultfolderx5.sfl',
-                  '~/Library/Application Support/com.stclairsoft.DefaultFolderX5',
-                  '~/Library/Caches/com.stclairsoft.DefaultFolderX5',
-                  '~/Library/Preferences/com.stclairsoft.DefaultFolderX5.plist',
-                ]
-  end
+  zap delete: [
+                '~/Library/Application Support/.com.stclairsoft',
+                '~/Library/Application Support/com.apple.sharedfilelist/com.apple.LSSharedFileList.ApplicationRecentDocuments/com.stclairsoft.defaultfolderx5.sfl',
+                '~/Library/Application Support/com.stclairsoft.DefaultFolderX5',
+                '~/Library/Caches/com.stclairsoft.DefaultFolderX5',
+                '~/Library/Preferences/com.stclairsoft.DefaultFolderX5.plist',
+              ]
 end