1].Install the App "As Trial" Don't Put any Info during Installation (Screen 1,2)
2].Find the folder "Activator" in activation folder in Install Directory (eg) 32-bit "C:\Program Files\Paragon Software\HFS+ for Windows"  10.4 Or 64-bit "C:\Program Files (x86)\Paragon Software\HFS+ for Windows"
3].Open it Enter Keys Restart your Computer
4].Done Enjoy~