cannot create Connection in Toad Freeware

Hi @ all,

i have a fresh Installation of Toad for Oracle freeware. After first start i am geting an error:

No vaild Oracle clients found. You need at least one 64-Bit client properly configured.

So, no problem, i want to configure one. At the next window i click on "Add login record" and configure my login details to my database server.

But now, when i try to test the connection i am getting this error:

List index out of bounds (-1)
To see what data this error report contains, click here.

The details you can see at the attached image.

I can't find any solution for that. I've tried this:

But same error.

What can i do?

Thanks for help and best regards,