diff --git a/goldendict.pro b/goldendict.pro
index e3cafde7..a24facaf 100644
--- a/goldendict.pro
+++ b/goldendict.pro
@@ -428,6 +428,7 @@ SOURCES += folding.cc \
     btreeidx.cc \
     stardict.cc \
     chunkedstorage.cc \
+    utils.cc \
     weburlrequestinterceptor.cpp \
     xdxf2html.cc \
     iconv.cc \
diff --git a/loaddictionaries.cc b/loaddictionaries.cc
index 38c88a1f..c3ec702c 100644
--- a/loaddictionaries.cc
+++ b/loaddictionaries.cc
@@ -397,19 +397,24 @@ void loadDictionaries( QWidget * parent, bool showInitially,
 
   QDir indexDir( Config::getIndexDir() );
 
-  QStringList allIdxFiles = indexDir.entryList( QDir::Files );
+  QStringList allIdxFiles = indexDir.entryList( QDir::Files | QDir::Dirs | QDir::NoDotAndDotDot | QDir::NoSymLinks );
 
-  for( QStringList::const_iterator i = allIdxFiles.constBegin();
-       i != allIdxFiles.constEnd(); ++i )
+  for( QStringList::const_iterator i = allIdxFiles.constBegin(); i != allIdxFiles.constEnd(); ++i )
   {
-    if ( ids.find( FsEncoding::encode( *i ) ) == ids.end()
-         && i->size() == 32 )
-      indexDir.remove( *i );
-    else
-    if ( i->endsWith( "_FTS" )
-         && i->size() == 36
-         && ids.find( FsEncoding::encode( i->left( 32 ) ) ) == ids.end() )
-      indexDir.remove( *i );
+    if( i->size() >= 32 && ids.find( FsEncoding::encode( i->left( 32 ) ) ) == ids.end() )
+    {
+      if( QFile::exists( *i ) )
+      {
+        indexDir.remove( *i );
+      }
+      else
+      {
+        // must be folder .
+        auto dirPath = Utils::Path::combine( Config::getIndexDir(), *i );
+        QDir t( dirPath );
+        t.removeRecursively();
+      }
+    }
   }
 
   // Run deferred inits
diff --git a/utils.cc b/utils.cc
new file mode 100644
index 00000000..928becee
--- /dev/null
+++ b/utils.cc
@@ -0,0 +1,7 @@
+#include "utils.hh"
+#include <QDir>
+
+QString Utils::Path::combine(const QString& path1, const QString& path2)
+{
+  return QDir::cleanPath(path1 + QDir::separator() + path2);
+}
diff --git a/utils.hh b/utils.hh
index ff27321e..e8cf5fe8 100644
--- a/utils.hh
+++ b/utils.hh
@@ -274,6 +274,10 @@ inline bool isAudioUrl( QUrl const & url )
 
 }
 
+namespace Path{
+QString combine(const QString& path1, const QString& path2);
+}
+
 }
 
 namespace
@@ -313,4 +317,6 @@ inline QString getHostBaseFromUrl( QUrl const & url )
 }
 }
 
+
+
 #endif // UTILS_HH