So I changed out all the video files in my game from 720p to 1080p, and now steam is unable to download the game after I updated the build... It simply stops completely at 95 %. I tried to erase all previous builds, still doesn't work, changed the NWjs version to a newer one, still doesn't work. When I revert back to the an older build, works just fine. What's strange is that all files are still present in the downloading folder, but booting the game doesn't work here, so there's obviously something missing.
Any steam developers encountered this before?