How do I now migrate from 32bit to 64bit?

How do I now migrate from 32bit to 64bit?

I see from the v10 release notes that it is now possible to migrate from 32bit to 64bit:

12. Ability to migrate Desktop Central from 32-bit to 64-bit version has been introduced
 

Can anyone point me at the instructions on how to perform this migration and if it's possible to do it on the same server?

Cheers,
Fernando
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