The patch.exe includes a bad registry patch (REVENGE version), so a new one has been included (DDL-IL.NeT). Make sure you follow the install steps very precisely
Install Info
Read CAREFULLY and follow steps in that order
1. If any prev versions installed, uninstall, use CCLeaner (or like app) to remove any lingering registry keys. Reboot
2. Disconnect from the internet or use firewall to block outgoing traffic
2. Install using ‘CuteFTP.Pro.v.8.3.4.0007′
3. Run CuteFTP Pro once. Then close CuteFTP
4. Copy Patch.exe to ‘CuteFTP 8 Professional’ folder in program files area. Run Patch.exe (as administrator)
5. Now, double click CuteFTP.Pro.v.8.3.4.0007.reg. This adds the needed info to your registry
6. Run CuteFTP. You may get an error, pay it no mind, once you get past it, you should have a fully registered version