I am using TOAD 220.127.116.11. I originally had installed it using an Oracle 11g home, but now want to use a newly installed Oracle 12c home. I have the set the new Oracle Home as the TOAD default and all new connections are created using it. But I want to change my old 11g connections to use the new Oracle Home. When I try to change them via the dropdown, I get an error: “Can’t initialize OCI. Error - 1”, and it won’t connect, even when there are no other connections.
My question is: How can I change all the older connections (11g) to the new 12c Oracle Home?