32 bit to 64 bit W10

Hi. I have a PC that is currently running W10 32 bit, but is capable of running as 64 bit. Is it an easy/safe process to install the 64 bit version of W10? I don't think I'll have any hardware compatibility problems. If it is possible will there be any issues with the Microsoft licence. I got W10, like most people by the free upgrade route from W7. I have a licenced upgrade version of W7 both 32 bit & 64 bit. I'd like to be able to do this as many games are now only available in 64 bit format.
Thanks, Dave H.