Library and Application Preferences

Hey guys, new to Mac OSX so these may be stupid questions but...

I installed Photoshop CS5.5, although I ran the Adobe Uninstaller to remove it, and a few days later I wen't to uninstall another program, and navigated to something called the Library, in there I saw some folders called Adobe CS5, and some files with 'Photoshop' in the name, I presume these are preferences etc. So I deleted them.

Could this damage my system? Could anything in the 'Library' folder damage my system if it is removed?

Many thanks.

 

I didn't delete them directly from the Library, but in the preferences folder.

I restored them from the Trash, nothing should be harmed right?

If they don't slow down the Mac, then I'll leave it.

 

Thats fine, I restored my Preferences folder from a backup in TimeMachine I had 4 hours before deletion, but I told it to keep the original file if it existed, so it just copied any file that had been deleted.

Thanks for your help!!!