they said on the Twitch stream that it should happen on Tuesday, but they also said it might take longer, since they don't have control over how the different platforms release it
I just noticed yesterday that I can view the Ignition library sorted by "updated date", and then I can find songs in my collection that are newer than the copy I have. This is time consuming, and I was wondering if there is a way to receive an eMail when an author updates a Custom song.