Trash the SfW prefs in your Library:Preferences folder to reset them.
Thanks for your response. Maybe you can help me clarify: Are the SfW prefs the same as the "Optimized Output Settings" or "Optimized Settings" in Photoshop's Presets folder?
I couldn't find a more obviously fitting file in my computer's Library.
Thanks for your help,
I've worked it out. Stupid mistake on my end.