Start off, thanks for the time and energy to this topic.
I DL Sketchup 8 for quick and dirty model making for a makerbot. I also DL the plugins which you provided in proper sequence per your directions. I cannot make a successful .STL file.
I do the export box by giving [inches], I have used stl in the next option box,then save. I go to my save location and get a Security Cert. I change the open with command to sketchup.
The makerbot interface does not see it.
windows 7, 64 bit, Sketchup 8(latest).
Thank you again.