it sounds like you have the project (cwp) files saved but not the corresponding audio (wav) files. have you used the audio finder tool?

Who was the "audio finder tool" tip directed to, and how do you access it? 

VS-100 working happily on Windows 10 here, but I did need to alter the driver installer's config file and disable driver signing on Windows 10 for the install (then reinstalling the driver).  Not too difficult for a techie, but if you aren't relatively comfortable with these things you should wait on the upgrade until Roland has the W10 driver out.
 
Glen