Same issue here with QOTS II and P3DV4, since last week I am not able to reload any saved flight, both saved through P3D or FSUIPC - it worked fine for several months before, the issue came out of the blue and I was not able to narrow down any changes or updates I did that would trigger this issue.
When trying to load a saved flight, either P3D has a CTD or the sim loads with no Screens active and no landing gear.
Tried to reinstall Simconnect and uninstalled/reinstalled QOTS II twice to no success.
When I remove the respective *.sav file from the Panel State folder, the sim loads, loading the panel state then through FMC works fine without a CTD.
Actually - thinking about it - the reload gizmos started to be active after the latest Windows 10 cumulative update (1703) which was pushed in September.
The debug file states the following btw before CTD:
..systems inited.
Load flight:
PMDG\PMDG 747 QOTS II\PanelState\747.fxml.sav
03 04 05 06 07 08 09 10 11 12 13
I hope somebody is able to figure out what is going on here.
All my P3D items are whitelisted in my AV Software btw, no interference expected there - plus it workded before
Thanks
Joerg Uebelhart