Thanks for the link... according to that reseller upgrading from the previous mayor version (v5) will cost about 33% of the current price... also upgrading from v4 to v6 will cost about 67% of a new license... on the other hand Diptrace is a bit more flexible offering free upgrade to v2 for user that bought v1.5 after August 31, 2008
Well... in terms of upgrade policies they are more or less at same level, although Diptrace seens to be more affordable at the end.
I'm liking both packages so I will give them another try to both of them
Thanks