Actually...I did use right click...to download the file directly...to bypass MIME stuff...and it saved the file as mp3tool.txt.

Ah. It's not text gibberish, then.

One thing that Windows programs like to do (especially web browsers- I don't know why) is to force-assign a file extension onto the file if it doesn't have one.

Linux files often have no extensions. You've probably got a binary executable there that's perfectly good and just needs to be executed at the linux command prompt by typing its name. Just rename it without the extension.

I didn't try the link because it's Linux stuff and I don't run linux. But the "forced file extension" problem sounds like what you've got there.

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Tony Fabris