If you previously purchased the software and lost your code, you still have a few options:

A one-time purchase (no subscription) that provides professional-grade tools for a fraction of the cost of Adobe products.

Many users own PhotoStudio 6 because it was bundled with scanners (like Epson or Canon) or digital cameras. In these cases, the software is often "pre-activated" or the key is printed on the hardware's documentation. Top Alternatives to ArcSoft PhotoStudio 6