The link is broken...Sorry for that, the new version (v3.30) is not yet released, so it's not on the web. I have put a v3.29 folder on the Temp folder, address is: http://mikrotik.com/download/temp/3.29-mipsbe
Thank you.You must install a version higher than 3.24 and than in the license section in winbox pres "update key".