1. Check upgrade procedure everytime and change upgrade files accordingly.
2. Check there release blog everytime and if there are no database changes present in that particular version, empty "$setupcontinue" in upgrade.php (Change the condition accordingly)
2. PHP REQUIREMENT LINK : https://www.rukovoditel.net/download.php
3. Important : Always copy latest .htaccess from the package to _htaccess file in our package + make our changes i.e remove Options -Indexes from the file. This is to enable the file listing for upgrade files.