You can change the VNC password using SolusVM.
1. Login to your SolusVM Control Panel.
2. If you have multiple VPS, select the appropriate one.
3. Scroll down, and under the "œVNC Password" tab, enter your new password in the VNC text box. Then click on "œChange".
4. It will prompt for a confirmation. Click "œYes" and then reboot your VPS.