Install Info:

Just run the setup EXE and Click the Install button to install Nitro PDF Pro

When it's doen click on the Keygen button and run Nitro PDF Pro.
Choose Activate Manually using browser and copy the Installation ID to the Keygen
Then hit Generate and copy the Activation number the Keygen generated to the activate box in Nitro PDF Pro
And click Activate

That's it. So close the setup and test out the program 

Have fun