Thanks for your patience. Please try recreating the Muse Preferences. This should reset the panels position.
Also, just to clarify, Muse requires Mac OS 10.6 or higher: http://muse.adobe.com/tech-specs.html
Your shared drive is not your username folder. Instead, go to Macintosh HD:Users:[username]:Library:Preferences folder, or in the Finder menu choose Go > Home which will open your username folder.
The username folder is the home folder for whatever user account you use to log into your computer.