Hi David,
I'm sorry to hear you have this problem. As for the presentation, I suggest you open a fresh copy of SketchUp and the .skp model of your development. Make sure you don't initialize Modelur as this will color the buildings red if they can't be initialized properly. This way, you can at least create some screenshots without buildings becoming red.
As for solving the problem - can you please
send us the .skp file so we can check what's gone wrong? Also please let us know which version of Modelur you used to create it?
Thanks,
Jernej