Hi tobetada - any time you like! Go to https://ariavpn.net/ and select the plan you want, enter the code ARIA25Mon-Xwa7VPN which is 25% off of the monthly plan discount exclusively for Hivians.
Currently, our service is best suited for VPN users who prioritize privacy and security as well as for those who prefer to use a custom, open-source client, such as NetworkManager on Linux, Tunnelblick on Mac, or OpenVPN Connect on any other platform. (I'm using Tunnelblick). You download the raw certs to plug into the OS client and off ya go, into the unknown without a trace :)