i can't seem to open it
I need a little more info than that. :D
First: Is it the Windows Version or the Mac Version?
If it's Mac I sadly can't help, cause I didn't make that version and sadly also have no contact anymore with the person who did it. :(
If it is Windows: Did you unpack it? Have you double clicked the Erayu.exe?
Also update all your drivers.
Do you get any error message? And if so, which one? I found something for (I think Win10 or 8). maybe that helps.