Hi Xinnor, welcome.
The problem you have is not so clear. In the subject you say you have a downloading problem, but in the message you speak about opening it... you mean decompressing the zip archive? If you can't decompress it and get the executable (which must me run only after having decompressed it, outside of the zip file), then the archive could be damaged, hence you have to download it again.
On the other hand, if you can decompress and run it, then you should post the exact error you are getting, along with details of your machine and any other useful thing. The support team will then take care of your report.