Hi David,
Thank you for posting the question in Microsoft Community.
Unfortunately, you will not be able to run a code for changing file names in bulk. However, you may try to search for a third party software which could help.
Note: Using Third Party Software or Link, including hardware drivers can cause serious problems that may prevent your computer from booting properly. Microsoft cannot guarantee that any problems resulting from the use of Third Party Software or Link can be solved. Using Third Party Software or Link is at your own risk.
Thanks.