Hi,
Recently I have been facing this ;
http://puu.sh/bNjBk/dd6752d0be.png
I get two choices; Retry and OK
When I retry it takes about 5 seconds, a progress bar shows up but ultimately it fails and the same error shows up. If I click OK the launcher starts.
I’ve bought assets in the marketplace and I’m unable to download them, same goes for other free assets; I click download, a progress bar appears but nothing happens.
I’m on windows 8 64 and the latest ue build I installed is 4.4.3.
Is there a way I can download a new launcher without reinstalling UE4?
I have posted this issue on answerhub here: [Launcher] Error invalid installer - AnswerHub - Unreal Engine Forums