For some reason I am no longer able to just click on Music Creator and begin working on another project.  I've re-loaded this software and been having problems running it since then.  Any suggestions folks?   

What Music Creator version do you have?  What is your computer's operating system?  What happens when you double left click on the Music Creator icon?
 
Right click on the Music Creator icon and find the path to the executable file.  Then navigate to, and double click on, the executable file.  What happens?
 
Find a Cakewalk project file, right click and select properties.  Is the project file associated with Music Creator?