I can not download new asset from MockUps Gallery.
By trying to do that I get this error message "connect timed out"
My version is: 6.3.0
Thnaks in advance for your help
It looks like you are having an error with the network connection. If you are behind a proxy then you might need to configure it in WireframeSketcher preferences as described here:
Let me know if it works for you.