Updates

My tzt3 is still on version 2.50 , when I connect to internet it says there are no new updates, so I guess I’m not a version 3 tzt3 ,I am going to update with usb to the latest version,
my question is, can I go straight to the latest version and that will have all the fixes , etc from the previous updates or do I need to start with the update after 2.50?
 
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