As you are aware, we are working on a new BolehVPN-GUI and are close to going final with this build. Secure IP bind feature (or something similar) has had good progress so will be implemented in a later build.
This GUI should be close to final and has several fixes from our previous iteration:
You can download the new GUI here. It is recommended to uninstall any previous versions and copies of BolehVPN before installing this one!
Let us know what you think in the comments section!