in dconf-editor 
in /org/gnome/meld/filename-filters
eintragen

[('meld_no_cfg', true, 'out_bk_main main_lock stop cfg.* *.log *.out success* aa_* rr_* oldlogs _cpp conf done cpp btest backup_messages_test exclude interval_done label _not_used pre retains_count rsynclog templates _templates'), ('meld_cfg', true, 'out_bk_main main_lock stop *.log *.out aa_* rr_* oldlogs _cpp conf done cpp btest backup_messages_test exclude interval_done label _not_used pre retains_count rsynclog templates _templates')]

