Attempting to turn off file extension change confirm popup

I transferred many music files from a backup drive onto a new laptop running Windows 8, and found most renamed as numbered files with a .ptl extension. Found out that my backup drive (Seagate FreeAgent GoFlex) doesn't like long filenames and renames them as referenced above. ("ptl" stands for "path too long"). I have been renaming them, dumping the ptl extension to get the files back as mp3's, but I get a confirmation window that I have to click "yes" to for each and every change I attempt. I'd love to kill the confirm popup for every file I change, it doubles the time involved for each file and I have enough work just renaming the files back to their original names. I've looked all over the control panel for something to uncheck to accomplish this, with no success. Can anyone point me to the appropriate location to turn this off?

Thanks,
den6N

Open an Elevated Command prompt then use the ren command to change the names there. You could even create a batch file with the rename commands so all you have to do is run the batch command.

Something like:

ren filea.ptl filea.mp3
ren fileb.ptl fileb.mp3

Or do a bulk rename.

ren *.ptl *.mp3