Backing up !

Hi Guys, I need to save and transfer all my Kmail, Knode settings and passwords to a new machine running Jessie/TDE desktop. However the machine I need to transfer from is 32 bit and the new one is 64 bit, I don't know if that makes a difference. Which files do I need to copy over ? I've already done a backup of "Home" though some files didn't copy at all but I think that they were things like sockets. Thanks in advance for any help. -- Best Regards: Baron