A couple weeks ago, I posted a “slightly useful piece of software” which could be used to convert a bunch of BMP files to JPG. We’ll I just updated it to allow you to select the source and destination file types.
I’ve replaced the old download with the modified one, and you can get it here. Use at your own risk.
It’s pretty simple to use, but see the original post for more info. Let me know if you have any questions or suggestions. I probably won’t put too much work into it, but if it’s a good suggestion, I may.