The necesary and proper clause
if it won't work, try opening the launcher, then click options, then force update, then login and that should work.
To Update your work just go to the Tech you saved it to and open it. EASY
No.
It should update all by itslef when you log on.
to make sure its secure and work fine ( choose hotfix update )
That's part of what the update was supposed to do, prevent flashcards from working. But the original games should still work fine.
Every game should work on an Action Replay, but you may need to update first (if there is a new update available), or something may not work properly.
If the device does not work then you will have to update the firmware on the device
now you have to do a system update to get it
Unless you work for Mojang, I don't think you can make an update. But, what you could make is a Mod.
you need to update the system. then it will install the new update. or it could be the smudges on the disk