If you want to remove exactly (and only) [DJLoop] in your tags, you can try this:
Aktionstyp:Replace with regular Expression Field:_ALL Regular Expression:[DJLoop] Replace matches with:
[ ] Groß-/Kleinschreibung berücksichtigen<--- Sorry, I don't know the english translation for this
If you want to remove every text between [ and ] you can can try it with: Aktionstyp:Replace with regular Expression Field:_ALL Regular Expression:[([a-zA-Z]*)] Replace matches with:
[ ] Groß-/Kleinschreibung berücksichtigen<--- Sorry, I don't know the english translation for this