If I search files for "^." regex with "all matching lines", I get the lines with at least one character. If I do the same search with "file counts only" I see a larger number.
Example a.txt:
abc
def
Find in files "^.", in files "a.txt", regex, "all matching lines" output:
- Searching for: ^.
a.txt(1): abc
a.txt(2): def
Found 2 occurrence(s) in 1 file(s)
- Searching for: ^.
C:\Temp\a.txt: 6
Found 6 occurrence(s) in 1 file(s)