If she opens 6 drawings then TurboCAD opens in 6 separate windows.
If she opens the drawings from TurboCAD, using File|Open, then each drawing will indeed have its own window. If this is undesirable, an alternative is to open just one drawing from TCad and then insert
the others into this first drawing. (Use Insert|File for this purpose.)
If she opens the drawings from outside of TurboCAD -- from Windows Explorer, for example -- then each drawing is likely have its own instance of TCad running. This is not a good situation, because it's a severe drain on system resources and because the different copies can interfere with one another and raise havoc.