Photoshop CS4 will not launch

[Tolly]

Hello

I am hoping someone can help.

When I click on PS the icon on the dock jumps but nothing happens. PS is not open. It does not appear on the "Force Quit" list, it is not hidden, and when the icon is right clicked on it still gives the option to open.

I have tried the following:

- Restarting
- Opening it via Applications, quicksliver, by clicking on a raw file, opening via Adobe bridge...
- Using time machine back ups to restore PS
- Using time machine back ups to restore all Applications
- Uninstalling PS and then using time machine backup to restore PS

Nothing seems to help!

Hope someone has some ideas.

Thanks