No. You're in the wrong folder.
In the Finder, choose the Go to Folder... command from the Go menu. Enter:
~/Library/Preferences/com.camerabits.PhotoMechanic
Amongst a number of files and folders you should see a file named "com.camerabits.PhotoMechanic.prefsdb" which is the main preferences file. It contains your settings for each of the sections in the Preferences dialog.
-Kirk