i was havin the same problems i got to about 525 MB, then error pop up.

i tried all the non VPN solutions here, still a no go.

put in a support ticket, but yeah, don't feel like waitin round for a reply.

so i tried the VPN, it worked but was slow, like 10 hours + slow. i remembered that at points the launcher will save progress of the download. so i let it get to about 1050 MB. Canceled the download, shut down launcher, disconnected and shut down VPN, restarted launcher on my normal connection and BINGO!!! it saved the progress and continued downloadin.

i think it may hangs at a certain amount and the launcher saves it somehow, at least that what it seems like to me. i'm thinkin if ya can use the VPN long enough to get it past your hang point ya can manually cancel, shutdown Launcher and VPN. then restart with your normal settings.

Hopes this Helps