I use SQL*Navigator 4.5.1 every day. This morning I noticed the Main Menu bar is missing. When I right click the toolbars area and choose customize the square next to the Main Menu option is gray and cannot be selected.
Welcome to the SQLNAV community. This is very rare situation where your main toolbar disappeared. Could you please try to Rename the Expressbar registry entry which is located under Hkey_current_user >>Software >> Quest Software >>SQL Navigator >> MainForm >> Expressbars to OLD_Expressbars. Ensure during renaming the registry entry SQLNAV4.5 should be closed. Re Launch the SQLNAV 4.5 application after renaming the registry key. The Expressbars will be created by the application.