Well, this is really strange.
KOHighlights can't find the data.db file.
The weird part is that if there is no such file, it creates one.
The only way I could replicate this, was to create a directory named "data.db" inside "C:\Users\USER NAME\AppData\Roaming\KoHighlights\", so that it could not create a file with the same name.
I've attached a zip file that contains an empty data.db file.
Try to copy it to you directory, to see how it behaves.
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