Yes if you buy the bot with lifetime, you can use this bot account on any computer and any times, but it can only be used on one computer at a time.
Which means, if you're already using bot on your desktop PC, but you sign in the same bot account on your laptop at the same time to start botting, then the desktop PC's bot will be disconnected from bot server, your bot on laptop will continue to work.
Bot license is attached to your bot account, there is no need to re-register license code if you start botting on another computer with the registered bot account.