I don't think there's much info here but here you go.
For what it's worth, I remember distinctly that the itch.io installation folder had 2 subfolders in it. app-23.4.0 and app-23.4.1. After I installed app-23.4.2 manually as above, both the old folders are gone now. As well as the Windows 10 custom tile icon that I have for itch.io.
Yeah unfortunately the log doesn't have any info on the previous failure because you installed 23.4.2 manually afterwards.
Having 2 subfolders is normal, Squirrel.Windows keeps around the previous version of the app in case something goes terribly wrong, so there's something to go back to.
I've been working on our own installer so we don't have to use Squirrel.Windows anymore, because its failures are hard to look into :(
Here's the new system (not ready yet): https://github.com/itchio/itchSetup
I don't think it's that big a deal when the update fails and the installer has to be re-downloaded. But I read on the itchSetup repo that it's going to have some of the technology behind butler (I assume smaller diffed patches) then all the more power to you! Keep making itch.io awesome
The important line here is this one:
2017-07-16 12:07:05> IEnableLogger: Failed downloading URL: http://nuts.itch.zone/download/23.4.2/itch-23.4.2-delta.nupkg: System.Net.WebException: An exception occurred during a WebClient request. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
It just looks like it's that the file is too big to be downloaded from start to finish via your connection :( For this release, the `delta` package is about 80MB (whereas the full release is about 120MB), so it's still pretty big.
As I posted earlier, I'm hoping to deploy itchSetup soon: https://github.com/itchio/itchSetup - this will definitely work for poor connections since it knows how to resume a download when it gets cut off (which is what happened for you, repeatedly)
