When querying, wild card characters generally cause an expansion of the term they are found in. Until Recoll version 1.42.2, there was no way to escape them.
As of Recoll 1.42.2 it is possible to escape wild card characters with a backslash
when in File name search mode and it becomes possible to exactly
search for file names containing these characters. Previously, you would have had to use a
less precise search by replacing them with a ?
wild card or using
another mode.