Hi Ramon,
On the website of Autodesk, you can download de last version of Revit, 2017.
If you are a student you have to create an account or log in to download.
http://www.autodesk.com/education/free-software/revit
For the system requirements for Revit 2017, click here.
If there any problems with the previous versions you have to remove the older versions, how?
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Best regards,
Michiel Peperkamp
Cadac Group AEC
Cadac Group
Platinum Partner