For security reasons this option is not implemented.
However if you want to bypass this restriction you should do the following:
Download new OpenVPN configuration files from this link.
In the login.txt file replace "username" with Le VPN username and "password" with your Le VPN password and save the file.
Replace your old OpenVPN configuration files with the new ones in the following folder:
C:/Program Files/OpenVPN/config/ (for 32-bit Windows)
C:/Program Files(x86)/OpenVPN/config/ (for 64-bit Windows)