The full price of Rebelle 4 is $89.99. Existing users of Rebelle 3 are eligible for a special upgrade price of $44.99. To upgrade, please log in to your Community account and add Rebelle 4 upgrade to the cart. You can also upgrade directly from Rebelle 3's menu: "Help" -> "Upgrade to Rebelle 4". Upgrading is optional and the upgrade discount will be available until the next major release. You can continue using your actual version for as long as you like. If you purchased Rebelle 3 after October 15th, 2020, you are eligible for a free upgrade and can download Rebelle 4 from your Community account.