The version of Clip Studio Paint that was bundled with my pen tablet has expired, but I want to keep using it
To continue using Clip Studio Paint you can either sign up for a annual/monthly plans or buy the perpetual version.
Sign up for a annual/monthly plans (Windows/macOS/iPadOS/iOS/Galaxy/Android/Chromebook)
Buy the perpetual version (Windows/macOS only)
If you are using Clip Studio Paint, which is included with the WACOM products listed on the following page, you can use CLIP STUDIO PAINT for an additional three months free of charge by applying for the annual and monthly usage plan.