The SQL Editor window is taking a long time to open, like 5-10 minutes.
1. Close SQL Navigator
2. Go to the start menu, select the Run feature, enter regedit, and hit OK.
3. Find the Docking Areas and Docking Windows folders, located at Hkey_Current_User|Software|Quest Software|SQL Navigator 5.5.3, and rename them to Docking Areas Old and Docking Windows Old.