I don't know what's happened, but I guess that somehow I did something wrong...: most of the files hosted on my Mega account seem to be unavailable when people try to download them. The files are still there, but for some reason they have a different link now...
Sadly, at the moment I don't have enough spare time to check and fix them all at once... As usual, you can help me by letting me know which files are unavailable leaving a comment or writing to my usual e-mail address, thanks for your help!