I had a nice setup of Opus (buttons, bars settings) but for the joy's of XP I had to format and start again. I had thought that I had back'd up all my important stuff but low & behold Opus settings (B,B,S) have been lost. Where are all the settings kept - are you going to produce a setting/pref/export that backs all the important things up so as when you re-install you can import all those tweaks that we all add back in. 
There already is one. Try Import and Export in the default Settings menu.