How to delete the serial number file (Windows)
This FAQ provides instructions to delete the serial number file in Windows. The instructions to delete the serial number file on a Mac is presented here. The serial number file is also the license file. They are one and the same.
The Prism 7 and above serial number file is named: prism-license.qxt
The Prism 6 serial number file is named: ssprism6.qxt
The Prism 5 serial number file is named: ssprism5.qxt
Removing the Prism License File
Make certain that you have your serial number available. After you have deleted this file, you will need to go through the activation process again. As part of the activation process, you will need to reenter your serial number. To delete this file, you will need to be logged in with admin rights. In Windows Vista and Windows 7, the file is hidden, so you need to change your file preferences to show hidden files.
Show hidden files
To show hidden files on Windows, follow Microsoft's instruction in this article.
Delete the serial number file
With this complete (hidden files visible), locate and delete the Prism license file. The license filename is noted at the top of this page. The file may be located in one of these folders:
In Windows Vista, Windows 7/8/10/11 the license file is stored in:
C:\ProgramData\GraphPad Software\Prism\prism-license.qxt (for Prism 7 and above)
In Windows 2000 and XP the license file is stored in:
C:\Documents and Settings\All Users\Application Data\GraphPad Software\Prism\5.0\
C:\Documents and Settings\All Users\Application Data\GraphPad Software\Prism\6.0\