Thank you for allowing me to answer your question. The most recent version (2.0.3) of Audacity will allow you to easily export files to the MP3 file format easily. You can download this software for free at this link: Download Page for Audacity.
You will also need to download the free lame_enc.dll using these simple instructions which provide the download link and easy installation instructions: Get the lame_end.dll.
After these two short procedures, you'll be able to use File > Export to save your files as an Mp3.
If you have any difficulties or further questions, please don't hesitate to ask!
thabks for answering. i know there is a version that allows me to export it without having to dpwnload the lame. i used to have that version, but I lost all my files from my old computer. do you happen to know wgich version that was? or could you find out fpr me? : )