I don’t have the 64bit version of cubase 5 my version of cubase 5 os 5.2 32 bit but is not opening while it had the 32bit version in a 64bit operating system and it worked fine now when I installed it again it doesn’t open I don’t remember how I had done it and it worked maybe I had the hard drive in a 32bit system and I did the installation there which opens the program and then I put the hard drive in this computer that I now have a 64bit operating system and it worked