Hello, I tried to upgrade OSSN to 5.1 and followed the steps in the description. It's all new to me and I do not understand how it works. I've understood everything until to the point
Remove old Ossn installation from your site, except the folder named configurations and your Ossn data directory.
Upload all files and folders from locally unzipped installation package to former place on your server.
How should I proceed? Must the data in the FTP be completely deleted, except for the folder Configurations? But what does that mean with OSSN data directory? Which folder is this and where can I find this?