Rename the now ignored DisableFsRedir param to AIgnored, like already done for some other callbacks. In the end it might be the case that all are ignored, and that it can be removed all together.

Projects/Src/Setup.MainFunc.pas

@@ -2141,7 +2141,7 @@ end;
 var
   CheckForFileSL: TStringList;
 
-function CheckForFile(const DisableFsRedir: Boolean; const AFilename: String;
+function CheckForFile(const AIgnored: Boolean; const AFilename: String;
   const Param: Pointer): Boolean;
 begin
   { CheckForFileSL contains native-bit filenames, so AFilename needs to be