@Ricardo.Farinha I found also those paths on the DynamoSettings.xml. You can see them under . This file is storedat C:\Users\YOURUSER\AppData\Roaming\Dynamo\Dynamo Revit\2.10.
You could alternatively create an Extension that adds a new path. Have a look at Dynamo API - Set User Packages Location - #19 by Brendan_Cassidy