archive utility outputs hidden files

Hi,

I used the terminal to view hidden files with the command:

defaults write com.apple.finder AppleShowAllFiles TRUE

later I returned to the normal view with the same command (replaced the TRUE with FALSE).

Ever since whenever I expand a .zip file (with archive utility or stuffit expander) the unarchived file remains hidden, and I need to manually make it visable again.

Is there a way to "restore factory settings"?

Thanks, Jonathan.