When i try to download the new launcher it doesn't work and comes up with this message:
Launching game
Looking for old natives to clean up...
Deleting C:\Users\jbrac_000\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-3705141918587
Unpacking natives to C:\Users\jbrac_000\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-3845973197478
Couldn't unpack natives!
java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(Unknown Source)
at java.util.zip.ZipFile.<init>(Unknown Source)
at java.util.zip.ZipFile.<init>(Unknown Source)
at net.minecraft.launcher.GameLauncher.unpackNatives(GameLauncher.java:322)
at net.minecraft.launcher.GameLauncher.launchGame(GameLauncher.java:165)
at net.minecraft.launcher.GameLauncher.onDownloadJobFinished(GameLauncher.java:447)
at net.minecraft.launcher.updater.download.DownloadJob.popAndDownload(DownloadJob.java:95)
at net.minecraft.launcher.updater.download.DownloadJob.access$000(DownloadJob.java:10)
at net.minecraft.launcher.updater.download.DownloadJob$1.run(DownloadJob.java:65)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)