@Jiaz: Thanks for the quick answer!

Since the people begin to use the winrar5 compression method my JD2 couldn't extract the files as it used to be. After the program ends to download the files, when it tries to extract the file, always shows the same error: Extraction failed (CRC correct SHA1).
So I did what's specified in the first post, I downloaded the files for my Windows 10 64bits OS and uncompressed it at C:\Users\portuman\AppData\Local\JDownloader v2.0\libs.
Also in the settings tab on JD2 (last update installed) is showed 'file extractor: (7Zip Binding Version:15.09-2.01beta)'. But still happening the same problem.
What can I do?
Thanks!!