So I've been getting this too and was just about to post something about it today when I saw this. Good to know the admins are aware.
Here is a work around. (The only way for me at least to get rid of the white window and be able to use the GTN)
1. Close close the GTN app. If you are seeing the white window, you might need to end the task in task manager (ctrl+alt+del)
2. Go to C:\ProgramData\TDS\GTNXi\FlightSimEXE\
3. Delete TDSGTN.ini
4. Open the app again and start the GTN.
5. If you see the GTN screen blinking, it is because when it crashed (white window) it left the previous trainer running and now you have 2 trainers displaying information in the screen. You should have only one gtn_simulatro.exe process running. Press CTR+ALT+DEL and end any additional processes.
This works for me every time, the downside is that by deleting the TDSGTN.ini, your settings also go with it. (Just some settings and not the saved flight plans or map information field changes.)
Here is a work around. (The only way for me at least to get rid of the white window and be able to use the GTN)
1. Close close the GTN app. If you are seeing the white window, you might need to end the task in task manager (ctrl+alt+del)
2. Go to C:\ProgramData\TDS\GTNXi\FlightSimEXE\
3. Delete TDSGTN.ini
4. Open the app again and start the GTN.
5. If you see the GTN screen blinking, it is because when it crashed (white window) it left the previous trainer running and now you have 2 trainers displaying information in the screen. You should have only one gtn_simulatro.exe process running. Press CTR+ALT+DEL and end any additional processes.
This works for me every time, the downside is that by deleting the TDSGTN.ini, your settings also go with it. (Just some settings and not the saved flight plans or map information field changes.)