Upgrade Path from 4.0.10 to last version

Hello all.

I´m looking from upgrading a RT 4.0.10 with 135.000 tickets to last version 4.4.2.
My database is PostgreSQL 9.2.3 and my idea is create a new machine not an in-place upgrade.

Could any body help me with the update path?
Any advice will be apreciated.