Did you try "*.*" ?
Create a filter to show all files
That would totally defeat the purpose of the filter.
Sorry, I read to question to fast
Try with space after the dot ( "*. ")
Would that be:
new FileFilter("Legende", "null")
new FileFilter("Legende", null)
If this is not correct, maybe you just use browse() without fileFilter,
and then check the extension property of file() that selected from file browse