No, it's not encrypted but it's Badongo that automatically does that with files over 100mb.
You have to download bot the .aa and the .ab file and then the merge-file (the .rar.bat file in the link below those two). then double-click on that .bat file and you get a normal .rar.
But nevermind, I'll upload it to another site again because badongo is a bitch.
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