Several programs, including Libero, create files with the .prj extension. If you want Libero to start whenever you double-click on a PRJ file, you need to set up Libero as the default editor for PRJ files.
You must have rights to modify the HKEY_CLASSES_ROOT of the registry of the machine to set Libero IDE file association. If you do not have rights to modify the registry, Libero IDE ignores your settings.
From the File menu, choose Preferences.
Click the Startup tab.
Select the check box to associate Libero with PRJ files.
To open the most recently used project at startup:
From the File menu, choose Preferences.
Click the Startup tab.
Select the check box to open the most recently used project at startup.