Read the FAQ's tried to do a clean install no luck.  After reinstalling from the disc it just wont launch saying that I need to reinstall from the disc which I did.  Same results.  Now I have removed it again.  I have Windows 10, some things are different and I'm having a rough go so if there are some good links or articles that might help me that would be nice.  Thanks.  Would like to be back up and running again.

Hi. If you go to https://www.cakewalk.com/My-Account/Products you should be able to download it from there.
Clean uninstall instructions are here :http://www.cakewalk.com/Support/Knowledge-Base/2007013392/SONAR-2015-Clean-Install-Instructions
All the best.

Zargg
Clean uninstall instructions are here :https://www.cakewalk.com/My-Account/Products

Or here: http://www.cakewalk.com/Support/Knowledge-Base/2007013392/SONAR-2015-Clean-Install-Instructions
 

telecharge

Zargg
Clean uninstall instructions are here :https://www.cakewalk.com/My-Account/Products

Or here: http://www.cakewalk.com/Support/Knowledge-Base/2007013392/SONAR-2015-Clean-Install-Instructions
 

Oops I posted the same link twice 
Thanks for correcting me
All the best.