I bought a HP Pavilion Desktop a year ago running Windows 10 with 8GB of RAM and a 64 bit OS. The licence for Office is about to expire. I now need to download a new one. The MS Office that's currently on the pc is 32 bit. My computer is running a 64 bit OS. I only use Word and Excel (no big complex files - just very basic stuff) and I'm a home user. Should I install the 64 bit version or the 32 bit?