[ocl] Hide 6.6.0 release
diff --git a/downloads/hidden.txt b/downloads/hidden.txt
index 09fcb75..69541c2 100644
--- a/downloads/hidden.txt
+++ b/downloads/hidden.txt
@@ -1 +1,2 @@
 modeling/mdt/5.5.0/R201812031331
+modeling/mdt/6.6.0/R201812101441