Sonar Platinum audio files

Use your back up files 
or
Make a folder for each project.
Put the audio folder and the CWP icon within that folder. 
or
Move your old global audio folder content into the new global audio folder. 
 
never use the global audio folder. 
That's a bad way to work as you just found out.
From now on always use per project folders. 
They are super easy to deal with and you'll never loss your work. 

If it were me, I'd first dump all of the wave files in the global audio folder (that's a path defined in Preferences).  With all of the projects (CWP) in the same folder they should by default find their required audio when opened since all of the wave files are located in that global folder.    Then, as you open each project do a Save As to a new, unique folder name, and choose "Yes" to copy the project's audio -that audio should get copied over to the new project folder's \audio sub-folder that gets created on-the-fly.
 
What you should end up with is a series of folders, each named per the project, and each with an \audio sub-folder containing only that project's audio.   Then you will also have the global audio folder as a main backup... though technically that shouldn't be needed if you're using per-project audio (also in Preferences).
 

Cactus Music
Question, you say the audio is in this folder on your desktop. Is that just the audio?  
Where are your CWP files at this point? 

 
That is a good question...