At last we can move forward, I think that I was really prepared for new server start, but from what we saw really was failing, much of server restarts, bugs come from no ware. I had really hard weekend but now seems everything is stable.
Released new updater/launcher you will find it in downloads section: https://l2.ggames.eu/downloads
Old launcher will be supported till 2020-02-11, from that day old launcher won't give updates or if do they can be not correct.
Highly recommend to download and install new updater/launcher as soon as possible.
From 2020-02-11 will be turned back file check protection, that won't be allowed to connect to the server with custom files and game must be launched from launcher.