PowerRename has worked fine for me, can also recommend it. However, when there's directories and many, many files involved, I just use Python with pathlib. It'

PowerRename has worked fine for me, can also recommend it. However, when there's directories and many, many files involved, I just use Python with pathlib. It's a couple lines of code anyone can learn to do, with all the flexibility of Python. PowerShell would maybe also be suitable.