Marlin Opening problem

Hi there , I have downloaded Marlin , no problem opened zip klick on the Marlin text to open , and when it opens I have the Marlin text , no Marlin icon , just a Simplify 3D Icon ,and ofcourse if I klick on this , Simplify cant open it ! I have downloaded Aruino , no problemns , and other programs , no problem , just Marlin ! Any ideas whats happening please ?? I live in hopoe , stay safe , all the best Harry