There are two big issues that are affecting video creation right now.
1. At the very beginning, there is always a random note that gets pressed and sustained for several measures, or perhaps until the note gets played by the MIDI file itself. It has the light and sparks, but no note is there because it's not part of the MIDI. I think someone else described this problem too but it clearly wasn't fixed on Windows version 1.2.
2. At the beginning, the video randomly speeds up. The first few measures are fine, but then it speeds up out of nowhere.
This is what the render dialog tells me about the video (4:20 length): https://drive.google.com/open?id=1flCa55zJCY_RL1C9m9hmp5NUhaoqwBIv
This is the video that was generated (2:55 length with the glitchy note at the beginning): https://drive.google.com/open?id=1Y6xuJtqrIDO58N6XR-uD9HFhLr7ONc89
For some reason, a very small, unusable WAV file gets generated with every video.
The note misalignment is still very slight but not bad enough to be an issue for me. Also, I noticed that it saved my settings when I used 1.2 after using 1.1. Was this supposed to happen?