Convert version 4 configuration files

Directory Opus 5 is able to detect and convert the old configuration files
from Directory Opus 4.  Opus 5 will not convert environment files from
earlier versions.  If you have a version earlier to version 4 then you will
have to convert the files using version 4 first.

If you select 'Load Environment' in Opus 5, and try to load an old version 4
configuration file, you will be given the option of what to convert.  The
base-name you specify will be used when creating individual files
corresponding to button banks, etc.

Opus 5 will convert your old Buttons, Menus, Filetypes, and Hotkeys.