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I am trying to work my way through the book, "Photoshop 5 Classroom in a Book." It says to restore default preferences, start by deleting the Preference File before beginning the lesson. I went to Photoshop5/Adobe Photoshop Settings/ and found 4 files:
1. Actions Palette.psp
2. Adobe Photoshop5 Prefs.psp
3. Color Settings.psp
4. Photos50.ini
Should I delete all 4 files, only the .psp files, or only the Adobe Photoshop5 Prefs.psp?
As I recall the APSIAB for 5, there is nothing that will be affected by leaving all but the Adob....Perfs.psp file. When doing the various exercises (3 - 7 and probably the same with CS), I do not bother doing this, especially as I might receive an emergency call from a client, and don't want to have to go to my backup Perfs setting. I just know that something might not work exactly per the instructions.
One caveat!!!!!! Make a re-named backup, or create a BU folder for any Perfs file you are likely to delete. While it's not a catastrophe, you don't need to reset all your Prefs, when you get on with work, or play, in PS.
Hunt