Strater 2, 3, and 4 and above automatically open the SDG file with all the borehole views opened.
In Strater 1, when you open an SDG, only the borehole view that was opened when the file was saved is opened. All the other borehole views are still saved in the project, they are just not visible. To open the other borehole view, click View | Borehole Manager. The Borehole Manager will open with all the borehole views listed in it. Double click on any of the borehole views to open it.
Updated May 3, 2018