(for convenience I'd enabled Quick Search "letter only" and disabled beginning/ending, but this is not a prerequisite for the bug)
2. Open the TC installer file and the contained INSTALL.CAB
3. Navigate into subfolder Language
4. <Ctrl+S> filter: "Deu"
5. copy<F5> the 3 matching files to destination folderA
6. <Ctrl+S> filter: "EN"
7. copy<F5> the 1 matching file to destination folderB

This seems to be an old bug.
Reproduced with TC7.56a, TC7.57rc2, TC8.0ß20(x86/x64) / Windows7
Regards
Holger