program stopped working

[vmLOGIC]

Thanks for the reply.
Unfortunately, I don't have a backup – I'm not used to programs that corrupt their data

The studio has been around for more than 20 years and is used by several thousand satisfied football fans. A case like the one that happened to you is extremely rare, but it can occur.

... and don't automatically back database up

And precisely because this happens so rarely — I suppose — some users don’t create backups regularly, even though the documentation points this out several times.