I did a complete uninstall including user files and registry entries. Before that I did an export of TV channels and groups from the TV Server config and a complete backup of MediaPortal using BackupSettings (which includes all configuration, plugins etc.). I did not include TV server settings in this backup to make sure that I don't export and import the problem itself. All this can be configured in BackupSettings. The whole procedure took about an hour and everything was up and running again.
Germany