Network drives are no longer a supported standard for the RetainPro File > Open dialog. RetainPro now makes use of a new feature called "Network Locations". These are the new standard in Microsoft Windows and are similar to mapped drives with the exception that no drive letter is allocated to these network locations. To setup a network location, click on Computer (or My Computer) and select the button named Add Network Location. If you are unable to locate the button, right-click anywhere in the white space on the window, and select "Add a network location" from the popup menu. Follow the wizard steps, and it will allow access to the network location directly from within the program.