This util removes unnecessary spaces from filenames created with UnD64.
Renames whole directories in one go:

DeSpace <path> [QUIET]

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                17059   40016  42.6% -lh5- fe37 Feb 26  1995 DeSpace
[generic]                  413     693  59.6% -lh5- a285 Feb 26  1995 DeSpace.doc
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         2 files   17472   40709  42.9%            Feb 27  1995