In extension version 3.16.0 and 3.16.1, the ATC Package management function is not functioning properly. Here is what appears with 3.16.x when you click the carat to expand the ATC versions:  Here is what appears with the 3.15.1 extension: 
In extension version 3.16.0 and 3.16.1, the ATC Package management function is not functioning properly.
Here is what appears with 3.16.x when you click the carat to expand the ATC versions:

Here is what appears with the 3.15.1 extension:
