Comment 2 for bug 1591793

I think we're seeing the same thing. Eeschema or Pcbnew flashes open for a second, then KiCad manager appears on top again. It seems to me if the user opened the schematic or PCB tool, that KiCad manager should stay in the background so the user can get to work.

On another PC, with Win7 x64, I see the same behavior. Here's its info:
Application: kicad
Version: 4.0.2-stable release build
wxWidgets: Version 3.0.2 (debug,wchar_t,compiler with C++ ABI 1009,GCC 5.2.0,wx containers,compatible with 2.8)
Platform: Windows 7 (build 7601, Service Pack 1), 64-bit edition, 64 bit, Little endian, wxMSW
Boost version: 1.57.0
         USE_WX_GRAPHICS_CONTEXT=OFF
         USE_WX_OVERLAY=OFF
         KICAD_SCRIPTING=ON
         KICAD_SCRIPTING_MODULES=ON
         KICAD_SCRIPTING_WXPYTHON=ON
         USE_FP_LIB_TABLE=HARD_CODED_ON
         BUILD_GITHUB_PLUGIN=ON