labview 64 or labview 32 bit?

Hi, I have a new 6 bit pc and an old 32 bit pc and I have to use both of them. If I install on the 64 bit machine labview 64 bit, when I save a vi, can it be opened on the 32 bit machine?

With this kind of problem, do you suggest me to install labview64 or labview32 in the 64 bit pc?

Thanks