so many steps to install x64 ,it starts with 1.0 x86 ,then 1.2 , then u need to install 1.5 cause u can choose now x64 ,then when u finaly have the x64 ,some sample presets not work cause the preset,sound/samples  are in the x86 folder . i hope soon cakewalk will come with big big updates.

 
I wonder where you got the impression that all that was needed.  Do you have Dimention Pro 1.5 in your Cakewalk account?  Just download that.  I'm sure there will be no future changes to DimPro since it's been superceded by Rapture Pro.