Toad Error OBJECT expected on line 1.

Following error occurs when Savedsql.dat file is corrupted. 

Solution of this error is RENAME Savedsql.dat file and start Toad again.

File location is 

C:\Program Files\Quest Software\Toad for Oracle\User Files

                    OR

C:\Users\SK\AppData\Local\VirtualStore\Program Files\Quest Software\Toad for Oracle\User Files