Right now I noticed that it was featured on AutoCAD 2014’s welcome page.
In AutoCAD 2014 there is also a Featured Apps tab where I found it showing up.
When installed, SSMPropEditor will show up on the Plug-ins tab.
For details about the release of SSMPropEditor 5.0 see this post here.
Visit the SSMPropEditor page for all about the product and give the free trial a try.