Corel (the developer of PaintShop Pro) often provides accessible ways to use their software without resorting to illegal downloads.

: Corel frequently runs deep discounts (often 40-60% off) during holiday sales or "Back to School" events.

You can buy a one-time license (not a subscription) for PaintShop Pro. Current versions range from $59.99 to $99.99 depending on sales. The license is perpetual—you pay once and own it.

: A free, web-based editor that mirrors the interface of professional suites and handles PSD and PSP files with ease.

These are 100% free, legal, and receive regular updates.