Uhm, no. Read the release log - it says that in 4.0 the Qt UI will be feature complete, however, GTK+3 UI is already gone in 3.10, so you can use either GTK+2 o

Uhm, no. Read the release log - it says that in 4.0 the Qt UI will be feature complete, however, GTK+3 UI is already gone in 3.10, so you can use either GTK+2 or Qt5.