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@roadscape: so I have to wait for the bugfix, right?
Or are there any other options?

The bug has been identified and will be included in the next release. For details/comments please refer to https://github.com/steemit/condenser/issues/1237

Thank you so very much @roadscape.
Thus can I change my settings till then to correct ones somehow?
Somebody mentinoned I could change my Json data manually, but I don't have any clue how?

You can wait until the changes are deployed on https://steemit.com, or if you want it fixed now you could update your profile here: https://steemitstage.com/@heikomahr/settings

Although, as a general warning -- you should only type in your Steemit password on domains you trust. The steemitstage.com domain was announced here.

Thanks a lot @roadscape.
As far as I understand it is is an offical project of the steemitdevelopers, isn't it

Thanks it worked fine!!!