Encoding file names problem

[Nestor-zz]

Hello, I'm using your great GoldRaccoon, but I have problem with encoding files names or folders names. For example, when I try to get file name (from listing folder request), I get something like this:
"test ąćę.mp4"
instead of:
"Test ąćę.mp4" (ąćę are polish signs)
And now I cannot download this file, because it has improperly file name.
Is there any way to properly encode string? Does GoldRaccoon support different encoding types?
Any help would be very nice.
Łukasz