You are welcome to leave the Alpha release any time if it's not working out for you. To do so, please send us an email at firstname.lastname@example.org. At that time, you're also welcome to follow the steps for uninstalling AdBlock VPN Alpha.
We do not have plans to add users to the Alpha release at this time, however, we plan on releasing a Beta version very soon. If you're interested in being a part of the Beta release, please sign up here: https://getadblock.com/beta/vpn/