system
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Did you try to reinstall the whole package ?
This is my advice only, but it’s founded on experience.
I’ve got many troubles with the automatic updates, I don’t know why but sometimes the tray icon disappeared or I got Win error messages. This is why I switched to manual 2 months ago. Once a day, at least, I check for new database and software versions, and it runs fine.
We have 3 computers here in the house and we’ve got identical problems on the 3 which are solved now with this method.