Upgrading from Wingate 4?

[Ekkas]

I've got Wingate 4 standard(6 users)

Can I upgrade to latest version (professional - 25 users) to save some money or must I buy full pack again?

[Pascal]

I've got Wingate 4 standard(6 users) Can I upgrade to latest version (professional - 25 users) to save some money or must I buy full pack again?

Yes, there are several upgrade options available. You can check with your local reseller (http://www.wingate.com/resellers.php) to confirm pricing.

If you do not need to upgrade your license type / user count, you can use WinGate 5 with a version 4 license key, you will just not get the additional features (Such as WinGate's Email server)