Hi - I'm on a Mac - OSX 10.4.11 Trying to get DNG 6.7 installed. Says 'sucsessfull' but big line throght icon and app won't open. Previous DNG was 5.6 and was fine. Dragged it to trash to delete. and deleted trash. Then realised poss mistake and ins

Hi - I'm on a Mac - OSX 10.4.11  Trying to get DNG 6.7 installed.  Says 'sucsessfull' but big line throght icon and app won't open.  Previous DNG was 5.6 and was fine.  Dragged it to trash to delete. and deleted trash. Then realised  poss  mistake and installed AppDelete and reinstaled 5.6 and draged to AppDelete  - along with 6.7 then tried again to instal 6.7 but still no good.  Any ideas what I can do? or where things have gone wrong and how can I fix? Thank you .