I cannot find the proxy button to import object into my sketch up model. Is it no longer available, is there another way to access it?
@sgaylordone , the proxy import functionally is still available of course.
In the first instance, please make sure you’re running our latest version of Enscape and afterward, simply click “Enscape Options” and then “Linked Model” → This allows you to import any .skp file as a proxy. 
Before installing the newest version, it cannot hurt to uninstall any previous or other versions of Enscape currently on your machine. Just to avoid any potential problems caused by having multiple installations of Enscape.