It is an official?
You must be kidding, this must be a scam, not official, easy to cheat on people, never trust this people, it is newbie.
Not a joke. You can download the wallet NOW. https://www.bitcoinunlimited.info/download
Virus total says 4/61
https://virustotal.com/en/file/26ef474ca4dfcdfb547b865db49fe9de381d97be70bb0e7cd90e3915841a14e2/analysis/
https://www.virustotal.com/en/file/f260d52cf2fe91c4be99ed6fcf8aa0de669ff326c5da920b7ed3a3e2ec981e0a/analysis/
This one is a scam