If streaming on two different twitch accounts, then yes, you would need to buy a second license. All the settings are stored in the data folder. So what you would do is after someone is done with the bot, just close it, and rename the Data folder to like Data1. Then do the same with the other Data folder. You just have to rename it back to Data for whoever is using the bot. Just need to make sure the bot isn't open when doing so.