◦Download Quick.Cms v5.4 » ◦To migrate data in this case takes only copying the contents of the "database/" directory (except for the "_fields.php" file and subdirectories) from the older version to the "database/" directory of the new one. ◦Also copy the "files/" directory with all its contents from the old version to the new one.
If I understand you correctly, I have to create a new CMS directory, then coping the mentioned contents. Im my case, after this job, If I start the new web side, I see only a new installation. Also, the admin login do not work, I have to access with admin, admin, but nothing about my pages. Really strange and hard to make a simple update! Regards