So yeah... I realized that in Orchard 1.7 Designer Tools come installed from default and the features are divided as: Shape tracing, Url alternates, Widget alternates.
I was able to delete the 1.6 old module I installed from gallery (by deleting the folder), recompile the module from the orchard sourcecode, replace the module in my Orchard site and enable the Shape tracing.
This thread also helped me to find out what I was doing wrong:
I posted this without getting to read Bertrand post, thanks anyway.
PS: The problem here is the documentation because it is full of deprecated explanations; sorry about asking silly questions but that's what happens with noobs like me. I will take some time in the future days to contribute to the documentations.