Thank you for your reply...
it's very simply, but it's that i've already done... (read my previous post)
the problem is that if i completely remove the old SPPB via the extensions manager, once completed i get this message: "You do not have access to the administrative section of this site." and I no longer have access to the administrator backend (so I can't install the new version of SPPB)
How can I completely and safely manually remove the old SPPB?
NB if i install new version over old version i get an duplicate column "catid" error on database and installation abort... see my other post/request
In the hidden contents you have your super user credentials
Thank you