Hello Kyle,
could you please send your license file to our support e-mail address (support AT
modelur.com), named modelur.lic and located in the following folder:
C:\Users\[YOUR USERNAME]\AppData\Roaming\SketchUp\SketchUp 2016\SketchUp\Plugins\Modelur
Once we have it, we can check what went wrong. And please accept my apologies for the inconvenience. Thank you.