No, if you already purchased those mods you only need to download them again

Thank you NIBOGO.

ve been looking for a good theme like this. I'm ready to order!  Pricing and payment info?

Is it possible to have this theme for spiders, but for human guests to have a different one?

Human guests and spiders are the same, if google knows that you are trying to identify spiders and show them something different then they could ban your website. I recommend that you use this theme for guests if you prefer another for users