Operating system: Windows-7-6.1.7601-SP1 64 Bits
Graphics card: GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.60
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: rBf6cb5f54494e
Short description of error
Closing any Blender popup window, such as Preferences or the render window will close the entire application, even if unsaved changes have been made (with no "save changes?" confirmation dialog).
All default settings, discovered this issue on first run with clean install.
Updated to newest graphics driver in case that was the issue.
Exact steps for others to reproduce the error
- Start Blender
- Open Preferences dialog
- Close Preferences dialog.