Match: (.*_dat)(20[0-9][0-9])([01][0-9])([0-3][0-9])(_.*)
Replace: \2-\3-\4 \1\2\3\4\5
(not "Include Ext.")
Filenames:
Anpassung der Zinssatze 800027812_dat20100714_id241787793.pdf
Anpassung der Zinssätze 800027812_dat20100714_id241787793.pdf
Result
2010-07-14 Anpassung der Zinssatze 800027812_dat20100714_id241787793.pdf
Anpassung der Zinssätze 800027812_dat20100714_id241787793.pdf
so BRU does not work for the file with "ä" in its name, same file but with "a" instead of "ä" works (but is wrong German word).
BRU 2.7.1.2 64-bit (Unicode)
OS: Win7-64 Ult