PhotoPlus X8 does not use an online activation server that validates your key every time you open the program. It requires the product key during the initial installation wizard to unlock the software locally.
Obtaining a valid product key is essential if you want to unlock the full potential of Serif Photoplus X8. Not only does it give you access to all the features and tools of the software, but it also ensures that you're getting a legitimate copy of the software that is properly licensed and supported. Serif Photoplus X8 Product Key
Serif Photo plus and Draw Plus registration key - Affinity | Forum PhotoPlus X8 does not use an online activation
Understanding Serif PhotoPlus X8 and Legacy Software Activation Serif Photoplus X8 Product Key