When I start Geany, and then switch to another window and back, Geany stops redrawing its canvas, I see only the empty OS frame with underlying content:  Then, if I slightly resize the window, or maximize/normalize, it redraws itself, and after that works fine - until the next restart. :) Must be a GTK problem?
BTW, how can I install a nightly build under Windows? It doesn't work, complains at missing functions in libs. Tried to install MSYS2, but it doesn't work either. :)
OS: Windows 7 64 bit Ultimate, QHD display (2560x1440), scaling 150%.