I had trouble installing a Prism update. Can I restore the old version?

The installer puts the old prism.exe file in a backup folder. For example, if you updated to Prism 11 and accepted the default installation folder, you should find the old Prism program file in ...\Program Files\GraphPad\Prism\Backup. Simply replace the newer prism.exe file, in ...\Program Files\GraphPad\Prism, with the older one.

Alternatively, you can use links similar to the ones below to install previous versions of Prism. Simply edit the link to get the desired version. For example, to install Prism 10.6.1 you would use the following:

Mac
https://cdn.graphpad.com/downloads/prism/10/10.6.1/InstallPrism10.dmg

Windows
https://cdn.graphpad.com/downloads/prism/10/10.6.1/InstallPrism10.msi

and to install Prism 11.0.0 you would use the following:

Mac
https://cdn.graphpad.com/downloads/prism/11/11.0.0/InstallPrism11.dmg

Windows
https://cdn.graphpad.com/downloads/prism/11/11.0.0/InstallPrism11.msi