Psql 9 Cross platform upgrade

Hello,

sorry if this is a bit off topic but as I'm going to switch from 
Netware to Linux server, I wonder if there is a way to upgrade without 
paying for a full product (as my Franch vendor says)

I run actually V8.6 on NW5.1, the V9 netware upgrade is in the box 
(never opened)

Thanks for any answer

Hubert

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