Default folder not in Look in List due to other choice already clicked.

Cause:

By default, the Look In list displays the default file location for the program or the currently open folder. The user has clicked on another choice in the Look In list box, causing the default folder to disappear. Subfolders also cannot be selected.

Solution:

Click 'Cancel' in the 'Advanced Find' dialog box then click 'Advanced...' again in the 'Open' dialog box.