OK selects the Current Selection, as does <CR> at the end of the Current Selection text.
The selection may be changed by either clicking on one of the radio-buttons, or by typing the directory name (full path, or relative to the current development directory) directly into the Selection, and then selected by either OK or <CR>.
Filter changes the directories displayed to those of the Current Selection.
"Double-clicking" on one of the radio buttons has the same effect as clicking the radio-button and then clicking on Filter.
Note that directories without write permission are not displayed.
If the selected directory is not a current BToolkit development directory, confirmation is sought on the creation of the new development.