The only way I know that there is a new Musescore "update" at my iOS 12.... (presently 12.1.1) is because I know it from my iOS 10.1.3 at my old iPad. At the new iPad I never!!! did get any update. So the only way to test the new update it is by deleting Musescore and downloading it again from iCloud. (Remember I don't update my old iPad to keep my precious version 1.13 alive). Then the new update will be installed but then also all Songbook data is lost again which unacceptable anyway. Latest Musescore version 2.1.10-15 jan.