To reapply the materials use the Edit Window Tool
or Edit Door Tool
and select the window/door to edit and it will bring up two dialogs (one of the dialogs might appear behind the other).
The way to copy a window/door a specific distance is the same as the steps above but instead of holding the SHIFT key just move the cursor along the direction you want to copy the window/door (the line should change to one of the axis colours), then let go of the mouse (be careful not to bump it) and enter a measurement as you normally would and the window/door will copy move. This is the same process you would use when using the SketchUp Line Tool as you're not able to hold SHIFT and enter a measurement either.
Would you be able to please let me know if this works for you?