I try to use TOAD 11.6 32 bit on Windows 8.1 64bit. But after installation software and start toad i can't connect to DB.
I found in windows register oracle root in HMLM\SOFTWARE\Wow6432Node\Oracle and copy it in HMLM\SOFTWARE\Oracle. But this didn't resolve my problem of connect.
TOAD didn't found tnsnames.ora.