That's weird, perhaps browser cache? Could you retry? I just downloaded it and it's good.
In my case i have downloaded at Sept 2nd and got 0.7.0 version, so i think its before the update
And i have download again today and got smaller size, maybe because its 0.8.0 version
0.7.0 zip file have 1.6 GB
0.8.0 zip file have 1.42 GB
Question :
Could i just upgrade from 0.7.0 (top right - help tab) than re-flash my sd card?I have the "update Now" red button there