I believe with Adobe a reinstallation will not affect your preferences.Just reinstall it. Should be easy.
I've tried what HowToHayden said, I have tried reinstalling it.
Jeffrey Tranberry - Adobe Staff said:Many odd issues can be resolved by resetting your Photoshop preferences.
The main preferences file is called "Adobe Photoshop CS6 Prefs.psp".
Once you find the file, save a copy to include in your bug report, then delete or remove it from the preferences folder.
Photoshop will create a new preference file the next time it is run.
Windows
Under Windows XP the preference file will be found at:
%windir%\Documents and Settings\[username]\Application Data\Adobe\PhotoshopCS6\Adobe Photoshop CS6 Settings\Adobe Photoshop CS6 Prefs.psp
Under Vista and Windows 7 or 8, the preference file will be found at:
Users\[Username]\AppData\Roaming\Adobe\Adobe Photoshop CS6\Adobe Photoshop CS6 Settings\Adobe Photoshop CS6 Prefs.psp
Macintosh
On MacOS the preference file will be found at:
/Users/[Username]/Library/Preferences/Adobe Photoshop CS6 Settings/Adobe Photoshop CS6 Prefs.psp
No problem, Glad to be of assistance.Fixed, thanks!