sage 50

SUGGESTED

I recently purchased sage 50 Cdn  and received the download version.    I installed it and it worked perfectly.  I let a relative play around on my new laptop.   A few days later I had work to do using the sage 50 .   When I clicked to open the program  , the SAGE green logo came up and instead of the program itself coming up on the screen a file folder appears and nothing happens from there on.     

I cannot get it to work at all , can someone please help me