Nodic Semicond has made a nice step-by-step description for how to fix a corrupted infoPage.
It involves starting nRFgo Studio from a command prompt with "-defaultsettings".
This works nice with studio 1.14.1
It does not work with studio 1.19.0
With studio 1.19.0, the program starts as normal no matter the -defaultsettings.
It would be nice if you could fix it sometime (for me it is not urgent).