Peter –
Faster/easier way is to create a new user (as you’re doing.) If you open the Settings window (command + =) and then Open Settings File (command + O) you’ll be given the option to open a Setting or Preferences File. Navigate to your existing User file (for your earlier version of MC) and select the Settings.xml. This will open up a separate window with your old (existing) settings file from which you can drag and drop individual settings that you have already created into your new User Settings tab. I believe you’ll be given the option to “Add” individual user settings the new settings, or “Replace” the new settings w/ old ones. You’ll probably want to mix-and-match at this point. But pre-set Export / Workspaces / Timeline / Keyboard settings – pretty much all set-ups – can be quickly and easily ported over to new base MC settings.
Hope that helps.
– AC