2019 - SolidWorks add-in can't get versions from history window

Anybody know why the "Get" button is grayed out in the history window when opened from within SolidWorks?

I can get older versions from the history window when opened from File Explorer, and I can even get versions from the Task pane in SolidWorks, but why can't I get versions from the history window when opened from SolidWorks?

ARRRGGGHHH!

SolidworksSolidworks Pdm/enterprise Pdm