If you need a permanent free solution, you don’t need a third-party plugin at all. Premiere Pro has built-in effects that can mimic Beauty Box’s core function: frequency separation and skin smoothing.
And underneath the photo, a new link:
If you decide to purchase the full version of the Premiere Pro Beauty Box, you'll get access to all of the plugin's advanced tools and features, including: Premiere Pro Beauty Box Free Download -FREE-