Finally yesterday got version 4.2.2 installed from 4.1.3
Today, trying to upgrade to 4.2.3 the process stopped with "acces denied" error although I set the permissions to 755/655 as suggested in the forum (and also 777/644 as stated in the Knowledge base).
Then I tried a rollback to 4.2.2 using the "restore.php link"... and the page stopped updating the database with another "access denied" error...
Now both the store and the Admin pages are locked with "error 500" and I hate this software.
Any hints???
Tnx in advance