Updating what i found out,
Versions 2, 3 and 4 runs ok after the evaluation in PC with Vista Premium
Entering the serial_number only for there is no chance to enter the authorization code.
2 says it will work until...and then says nothing , but it works ¡
3 and 4 says they will work for 335 minutes , but when done and got to 0 minutes, when re_opened they show again the same message and work ¡
So great. I am now running the three of them plus the 6 . 😄
Version 5 was not of my taste so i have not tested.
I have found much more easier to deal with big topographical_cad plans in 4 than in 6. zooming, panning, drawing ,...
it was not supposed to be like that but it is, and the power that 2 had is still missing .