I can't download snapshots

When I try to download the last snapshots, the launcher does nothing. I updated Java to 1.8.0_74 64bit, and still does nothing By the way, the launcher version is 1.6.11 (I couldn't select it on "Affects Version/s")

Versions I can't download:

1.9 Pre-2
1.9 Pre-1
16w07b
16w06a
16w05b

Solved in launcher 1.6.51 (I recently installed again Minecraft)