2nd time with this version that everything is gone. Have no clue about why, didn't really do anything unusual in the program. Also no crash.
I'm very sorry to hear about this. Unfortunately, without any information, there's no way we can triage the bug report to uncover whatever underlying issue has caused the loss. I would recommend using a support forum (e.g. https://forum.kde.org/viewforum.php?f=19&sid=85ecaf506e3550b1a21934baf64a6327). If the results of that discussion point to a bug in the software (as opposed to a configuration issue or user error), then we would be happy to investigate a targeted, focused bug report.