No, Username and Password are correctly specified, in the Data Source details.

Don't know why 'USERNAME:'  is not correctly logged into file.

Did it. File has been uploaded. See on your right 

Connections are OK:

I can perform queries successfully for new Data Sources (created after installed HS2015.2) AND for the previously created Data Source ones (created before installed HS2015.2).

Now, as a side effect, I'm not able to view any table or fields  for  all Data Sources configured.

Sure, I did.  Where can I get the ODBC log file? Thank you.