François
This is not a problem I have experienced when using DistWin under Windows 11.
Can I ask a few more questions about your situation? What version of Distance for Windows are you using? Most recent version available for download is Distance for Windows 7.5.
As I understand your problem, you were able to create a Distance project, however, having closed the project (and Distance for Windows), you cannot open the project you previously created. Is this accurate?
It is possible that you saved your project in a location of which Windows 11 does not approve? Into what directory did you save your project? As an experiment, could you create a project and save it in a different location; something unlikely to trouble Windows
11 like "My Documents". Report what you discover if you carry out the experiment.