"in-place", as long as you have the necessary prerequisites available.
Required software:
-* Web server with PHP 5.5.9 or higher.
+* Web server with PHP 7.0.0 or HHVM 3.18.5 or higher.
* A SQL server, the following types are supported
** MySQL 5.5.8 or higher
-** PostgreSQL 8.3 or higher
+** PostgreSQL 9.2 or higher
** SQLite 3.3.7 or higher
** Oracle 9.0.1 or higher
** Microsoft SQL Server 2005 (9.00.1399)