Configuration file corrupted
Close Toad for Oracle
Go to C:\Users\<your user>\AppData\Roaming\Quest Software\Toad for Oracle\<version of Toad>\ . For example: C:\Users\jsmith\AppData\Roaming\Quest Software\Toad for Oracle\17.1\
Locate file EditorLexers.xml and back it up outside the user files folder
Remove file EditorLexers.xml
Note: this file contains information about the Toad option in View | Toad options | Color Schemes.
Please set up this option again in case it is being used.
If the issue reappears after setting this option, please contact technical support.
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