The file org.kde.umbrello.appdata.xml contains a binary tag specifying the umbrello binary name, which is umbrello5 for KF5 builds.
Git commit 70aa7cf78289abbd9c26828c5119a71d766448a6 by Ralf Habacker. Committed on 25/03/2017 at 13:52. Pushed by habacker into branch 'Applications/17.04'. Fix 'org.kde.umbrello.appdata.xml specifies wrong binary name'. The binary of umbrello for kf5 builds is named 'umbrello5'. FIXED-IN:2.21.90 (KDE Applications 17.03.90) M +4 -1 umbrello/CMakeLists.txt https://commits.kde.org/umbrello/70aa7cf78289abbd9c26828c5119a71d766448a6