Steps for installing update/pactch?

[SupportAM]

I downloaded 3.8.7 PL3 but can't find upgrade instructions in search. Can anyone share link about steps to apply patch?
Thanks.

[ForceHSS]

<a href="https://www.vbulletin.com/forum/content.php/153-How-To-Install-Upgrade" target="_blank">https://www.vbulletin.com/forum/cont...nstall-Upgrade</a>