PS the gog game servers have extreme traffic this week and it sounds like you download stalled... Try going into gog galaxy options , downloading and tick the limit bandwidth tickbox

Set it to half of your normal download speed in mb so if you normal speed is 10mb (per second) then set it to 5mb... That should stabilise the download

Luke Skywalker: I don't, I don't believe it.
Yoda: That is why you failed.