Though it wouldn't affect the scale one reason why objects might not be displaying correctly is because RailClone uses an adaptive display mode that simplifies the geometry when the objects poly or object count exceeds a certain level. If objects are displaying as a simple box this is probably the case. This behaviour is controlled from the Display rollout in the viewport group, it is possible to override this behaviour and force the viewport to display the full geometry by clicking Mesh (see attachment). Either way it will always render the full geometry, it is just an optimisation to improve viewport performance
To address the textures issue, when RailClone is first used it should automatically add a number of user defined paths where the library's bitmaps are stored. If you go to Customise > Configure User Paths > External Files assuming RailClone is installed in the default location you should see the following entry:
C:\Program Files (x86)\Itoo Software\RailClone Pro\maps
If it is not present adding it manually should fix the problem. More information about this can be found in the installation and files reference.
I hope that helps, please let me know if you have further questions.