1.11.2 do not start

If I start my Minecraft launcher and select the 1.11.2, there is the Launcher hanging up and that he can not download the 1.11.2. With Optifine it does not work either. Even a new installation has brought nothing. This problem I have since the new launcher has come.
Could I have the old Minecraft Launcher back, so this problem does not occur in the future?

Best regards
XXTh3D3adXx