Wrapper template file?

I just updated to 4.5 and 2.1.0 and my site design got shook up a bit. I’m trying to tweak my wrapper, as managed through wordpress. When you create an IDX wrapper in wordpress, you don’t have the ability to choose a template through the UI like you do for regular pages. But I seem to remember being able to create a file in my template hierarchy that would be applied to it. My template actually has a idx_wrapper-page.php page that I think I created before, but it does not seem to be working (at present). I couldn’t seem to find any information in the documentation either.

So, to summarize, in IMPress, I have one global wrapper, which is accessible at http://mysite.com/idx-wrapper/globalwrapper/ Is it possible to define a template file for an IDX wrapper? If so, how should the template filename be constructed?

https://wordpress.org/plugins/idx-broker-platinum/