When entering my serial number into Clip Studio Paint I get the message "Please enter your 12- or 13-character activation code." - Clip Studio Official Support
![Let's get ready : Downloading software, confirming the serial number and installing|CLIP STUDIO - YouTube Let's get ready : Downloading software, confirming the serial number and installing|CLIP STUDIO - YouTube](https://i.ytimg.com/vi/i3XIN1ntWAw/maxresdefault.jpg)
Let's get ready : Downloading software, confirming the serial number and installing|CLIP STUDIO - YouTube
![Arya Lin on Twitter: "How to deactivate license and re-installing CSP (Clip Studio Paint) with the same Serial Number https://t.co/t21obkHZ5N https://t.co/WeB1Tf7RXw" / Twitter Arya Lin on Twitter: "How to deactivate license and re-installing CSP (Clip Studio Paint) with the same Serial Number https://t.co/t21obkHZ5N https://t.co/WeB1Tf7RXw" / Twitter](https://pbs.twimg.com/media/DsgL7xBVAAAzeky.jpg)