GuizmOVPN is a shareware.
You can use it without restriction during 7 days.
After this evaluation period, the VPN will disconnect every 5 minutes, with a 5 minutes delay between 2 connections.
The full version costs 4.99€, with no time limit or recurrent subscription.
It also includes free updates.
Please click on the following link to buy the full version. You will receive a serial number in the next hour.
If you don't, please contact support.