When I try and download the snapshot 17w60a it shows this error:

Unable to save download. client-1.7.xml
Name: client-1.7.xml
URL: https://launchermeta.mojang.com/mc/log_configs/client-1.7.xml/6605d632a2399010c0085d3e4da58974d62ccdfe/client-1.7.xml
Error details: Attempting to move successful download to C:/Users\finfa\AppData\Roaming\.minecraft\assets\log_configs\client-1.7.xml
The process cannot access the file because it is being used by another process
Filename on disk: d354-da5d-c863-d4d6
Path: C:\Users\finfa\AppData\Local\Temp\d354-da5d-c863-d4d6
Exists: file