Try opening the emulator first before installing via the launcher. It's much quicker and less prone to corrupt the gvm.store file. Before installing, I usually launch something like the calculator and then exit out of the calculator to the menu of the emulator. I then switch back to the launcher while the emulator is still running and start installing. Just be sure to switch back to the emulator after installing and exit out of that before you try to run something off of the launcher menu. Someone offered that tip in this forum for a prior beta and it works great for the new beta too.