Hello folks, grettings from germany

I have here a little problem with the Subtool App.

I use it to convert the english subs from DVD and Blurays. With the English language it all works very well.
But with the german language it is not so easy. We use many letters in germany that do not us in english. So subtools give me there control characters.
I read that I can boot up an package of german language into SubTools because it use the Tessaract OCR programm. But I dont know how I can do that.
Subtools told me to use the Language Pack for Version 3.02, but I only find any files for Version 3.04 von Tessaract.

Can you help me here and tell me where and how to download the right package and to install it ?

Thanks from here

Stephan

P.S. I use it all on a Mac.