Error on closing

[GCRaistlin]

Steps to reproduce:

1. Launch the application.
2. In Settings, change mode from Proxy to TUN.
3. Press RUN, wait 5-10 s (i. e., connect to a VPN).
4. Change mode from TUN to proxy through system tray icon menu.
5. Click Close in system tray icon menu.
   Expected result: the application closes.
   Actual result: "Exception Processing Message 0xc0000005 - Unexpected parameters" error window appears.

Windows 8.1 x64