The tip with changing the adress of free.db in File->Options->Tag-Sources->freedb->Adress to gnudb.gnudb.org seems to work.
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It seems their database hasn't been updated for several years.
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They updated the database 
Interesting quote:
We will not update instantly, as we will make some screening of the new submissions to make sure that the data are valid to avoid compromising the data.
I'm wondering how their data could be compromised, if they don't do any data check at all 
Everyone can submit to gnudb whatever he/she wants.