Batch Rename - Do search and replace multiple characters

[srom]

Batch Rename.

Do search and replace multiple characters.
For example,file names have a sequence of "abc" characters in any file name location. I want to replace them with a sequence of characters "defgh".
Make a case-insensitive and case-sensitive replacement option.

For example, make the /r key as a replacement. Use case: /r "abc" "Def gh". In this example, "abc" is case-insensitive, and "Def gh" is case-sensitive.
To search for a case-sensitive string, use the key "/rc". Use case: /rc "de Fgh" "De fgh". In this example, "de Fgh" is case-sensitive.