Yes, absolutely! I will keep Bootsketch up to date with the Bootstrap 4.0 documentation, as well as compatibility with Sketch. Questions, feel free to contact me and I'll reply within a day
Any update within the Bootstrap 4 ecosystem will be free. Updates, enhancements, and bug fixes to Bootsketch are also included in your one time purchase.
Use the contact form or reach out on twitter @BootsketchHQ