Cannot import standard assets from the store

When I try to import the standard assets from the asset store I get an error:

Package corrupted, deduced GUID exists but at different destination path, refusing import.
UnityEditor.Web.JSProxyMgr: DoTasks()

This has been reported and supposedly it is fixed, but the latest Linux release doesn’t seem to have the fix:

Is there any way that I can download the assets manually? It is very frustrating that I cannot even do that — that I am forced to use Unity for downloading. I should be able to download the assets through my web browser and then I could import the files I need manually. Instead, I am now completely stuck and all I can do is twiddle my thumbs and hope that someone in Unity decides to let me use the asset store.

We’ll get this fix in an upcoming build.