See more than a few posts asking how to upgrade, and either no answer or cryptic answer. I came here looking for the same thing, here's what works for me. I am no expert, just checking out CMS systems for the odd site and a charity I do some work for. If more educated readers than I spot some glaring error or mistake please correct it, just trying to help others who're struggling. System - Windows 7 32 bit. For the sake of this example (and matching my setup) Uniserver is located at D:\Uniserver Make sure Uniserver is not running (of course).... Rename old Uniserver folder, say "D:\Uniserver-old" - don't run it from that location or your paths will change in php.ini and mess things up. Put new Uniserver folder in its place - D:\Uniserver Copy <old-Uniserver-folder>\www folder from old to new - these are your sites Copy <old-Uniserver-folder>\usr\local\mysql\data from old to new - these are the sql databases Copy <old-Uniserver-folder>\usr\local\php\php.ini to new - has paths and .dll settings amongst other things. Make a backup copy of the file for good measure too, before or after copying. (If you're running Drupal 7 alpha/beta check following in php.ini; memory_limit = 40M (at least) and pdo.dll not commented out ) **** Keep a zip file of your old Uniserver folder in case anything is missing **** You should be backing up anyway right? :-) Done this procedure twice now on v5.6 and everything has migrated successfully. Hope it helps....