It is installed in the user folder and i only use drive C to my knowledge. If it helps it is the steam version as for any big update i only started trying to export several weeks ago so i am unsure. As for file size the first and only one to work appears to be 16kb, and all the others since have been 2-3.
It appears i have a problem exporting spaceships in that the only thing it will export to any 3d modelling software i seem to use is the central piece such as the hull box you can use which is imported as a cube. Now the main thing that confuses me about this is that i have one spaceship design that exported successfully and yet when i then went back in and used that same model the new exported version also doesn't export properly. So do i need to put anything into the spaceship design for it