I know how to utilize search masks in the forfiles command to target files of a particular extension, but I am working with a case where I want to avoid a particular extension and catch everything else. 

Is there an easy way to achieve this with the forfiles command or will I need to write a custom for loop to handle this process? I am not looking to run a command like below which would force me to define my search masks before hand. 

```
for %G in (.txt, .edi, .csv) do forfiles -p "C:abc\del" -s -m *%G -d -10 -c "cmd /c echo @path"

```

My use case is removing all files that are not encrypted from a directory recursively based on a single extension. This would be my negative value.