I just followed all your recommended step to upgrade but couldn't find ndxzstudio/cache(folder) so I applied 0755 permissions to the entire folder ndxzstudio
and then got this error message.
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /homez.110/damienra/www/ndxzstudio/install.php on line 25
Thanks for your help