PhotoKey 5 is no longer for sale, so unless you have already purchased a license then you will be unable to activate.
Step 1: Uninstall any existing copies
Firstly, uninstall any existing copies of PhotoKey 5 that you might already have on your computer.
Step 3: Run the installer
Run the PhotoKey 5 installer file on your computer by double clicking on its file icon (this requires administrator privileges on your computer). Follow the on-screen instructions to complete the installation.
Step 4: Activate the software
Step 5: Finished
PhotoKey 5 is now ready for you to use!