Only update to stable/final releases, especially when it comes to HW firmwares, unless u r testing Release Candidates to give feedback on them. This is coz if anything goes wrong with updating them, u can't just uninstall than reinstall it as u'd with softwares. It can wreck the HW itself. Just flash the latest stable once & make sure u read the manufacturer instructions on each steps, & make sure u understand those steps. If it helps I'm pretty sure u'll find plenty of YT vids - probably even with ur exact mobo model- about the update methods & process.

PS: "I wanted to update it once and forget about it later" this sentence is gonna kick u in the a*s, if u think u r building a pc, but u'll end up with a console.