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MR problem

Is it safe to upgrade the software for mr to the latest?
I have a magic module and a friend helped me put in mr 1.052 but that version is old and i want to upgrade it.
Someone told me that if you do not do it properly you can destroy the magic cam.
Can someone please tell me if this is true, and if not, can i upgrade it with 2 fun6 cards and a multi programmer.
Thank you!