FSX: Steam Edition missing fsx.cfg in AppData Roaming when installing TacPack

FSX:SE doesn’t use the “Microsoft\FSX” cfg folder by default

TacPack is looking for the boxed FSX config path:
C:\Users\<you>\AppData\Roaming\Microsoft\FSX\fsx.cfg

But FSX: Steam Edition normally stores it here instead:
C:\Users\<you>\AppData\Roaming\Microsoft\FSX-SE\fsx.cfg

So you’re not actually “missing” the cfg — it’s just in the Steam Edition location.

Step-by-step: get FSX-SE to generate the cfg (if it doesn’t exist yet)

1. Start FSX: Steam Edition one time.
2. Let it load all the way to the main screen (Free Flight).
3. Exit FSX.
4. Now check:
   C:\Users\<you>\AppData\Roaming\Microsoft\FSX-SE\fsx.cfg

If TacPack still insists on the boxed path
Some older installers only check the boxed location. Two common workarounds:

1. Create the expected folder and copy the cfg
   • Create:
     C:\Users\<you>\AppData\Roaming\Microsoft\FSX\

   • Copy your Steam cfg:
     ...\Microsoft\FSX-SE\fsx.cfg
     to:
     ...\Microsoft\FSX\fsx.cfg
2. Make sure you’re not being tripped up by hidden AppData
   • In File Explorer, enable viewing hidden items (AppData is hidden by default).

Note: I’d stick with a simple “copy” first (not moving anything), so FSX-SE keeps using its normal folder and the installer just has something to read.

A couple quick questions so I don’t steer you wrong

• Do you already have an fsx.cfg under ...\Microsoft\FSX-SE\, or is that missing too?
• Which TacPack installer/version are you running (and does the error message mention FSX boxed specifically)?
• Have you ever launched FSX:SE successfully on this Windows user account before?