When I open one of my existing database connections I get an ORA-00933 error. The connection; however, still opens.
I just installed Toad for Oracle Xpert 11.6.0.43, on top of my existing 11.5 installation.
WORKAROUND:
When logged in go to the schema browser, on the LHS (Left Hand Side) schema window and bring up the User To Load context menu. (See below)
After a right click, drill to Users to Load and deselect "Load only users that own objects including Synonyms and Temporary tables".
Select any other option (ie: Load all users).
See attachment for screenshot.
STATUS:
Waiting for fix in a future version of Toad for Oracle.