[Plugin: WP e-Commerce] .mp3 extension added by default to download files

I use the plug in for selling audio downloads in the .m4a format.

During testing I have found that the .mp3 extension is added to the downloaded files.

For example, I upload [mysong.m4a] and download [mysong.m4a.mp3]

Is there a way to stop this? I don’t want to provide .mp3 files.

Regards,

Al.

https://www.ads-software.com/extend/plugins/wp-e-commerce/