You can't use a serial key number to register this software because it's special activation method.
Given file includes both 32bit and 64bit patch, require some steps to complete registration.
DAEMON Tools Pro is greatest powerful and professional emulation software for disc images and virtual drives. Built image file, Mount image file, Create virtual drives.
How to install and crack DAEMON Tools Pro 8
1. Install it first.
2. Run it and close all processes with task manager
3. Go to C:\ProgramData\DAEMON Tools Pro and delete dtpro.dat
4. Copy patch x32 or x64 to installation directory and run as Administrator