you have three choices .
1 install the latest version 7.0.6 to see if it cures the problem .
2 trash your preferences as on most accounts this has cured the issue but not exactly the best solution
3 reinstall with 7.0.5 and then update to 7.0.6 .
im not sure if the repair function is still available in safe mode , I should think so , you could try that as well , also there are loads of threads on this in the forum