I'm currently looking to include this plugin in my workflow, but I can't get the dialog to come up when the file opens to fix outdated xrefs. If This doesn't work, I will need to find another option. Is there something I can do to fix this?

Edit:

So it turns out, the xref manager only seems to load at startup if the file is opened from windows explorer, but not by opening the file within sketchup...? Would that be an easy fix?