2015-03-07, 22:52:21
I don't have FSX Steam, so I can only speculate: maybe it has something to do with simconnect.
Apparently, other addons also have this problem and various answers/reports suggest that you have to install the legacy simconnect interface.
Thus, go to "C:\Program Files (x86)\Steam\steamapps\common\FSX\SDK\Core Utilities Kit\SimConnect SDK\LegacyInterfaces" and install all "SimConnect.msi" in each subfolder.
At least, maybe worth a try...
Apparently, other addons also have this problem and various answers/reports suggest that you have to install the legacy simconnect interface.
Thus, go to "C:\Program Files (x86)\Steam\steamapps\common\FSX\SDK\Core Utilities Kit\SimConnect SDK\LegacyInterfaces" and install all "SimConnect.msi" in each subfolder.
At least, maybe worth a try...
Regards