When the program shuts down like that, I recommend this procedure:
Launch Pr from a shortcut (taskbar, start menu, Desktop) while holding down the Shift+Alt keys. Alt resets prefs and Shift clears plugin cache.
Keep the keys pressed until the main program window appears.
Before trying to open any project or starting a new one, go to Preferences>Media Cache and delete *all* your media cache files.
Now try opening a project or starting a new one.
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