I can't open report modules on base

I’m a ubuntu 14.10 64bit user and I used libreoffice Base to create a data base in order to manage the cash flow of a not for profit association (an hockey team).
Recently, due to some system errors, I did a new installation of ubuntu (same release and version) and installed libreffice 4.2 again.
After that, all the report modules I created with the previous system can’t be opened at all.
Trying to create a new module I see that the interface is completely different from the one I was used to work with and it seems to be very primitive.
I was not able to find any extention for the report generator, can anyone explain me what happened and how can I fix it?
Thanks for every help.

Maybe something having to do with pentaho report engine?