Please let me know if this works for you by replying to this thread.

It is possible to use the 777 WorldlinerRS Mod 1.3.2
for CaptainSim models purchased in the MSFS Store.

The following steps are for the 777-200ER.  I own the
Store model 777-200 PW engines.  These instructions are
for that model, but should work with the MSFS Store
versions of the 777-200ER RR and GE.

Begin with the files you have downloaded from the
link in the "Fix 1.3.2 for the 777/764 WorldlinerRS Mod"
thread.

You will need three files:

wlrs-captainsim-boeing-base

wlrs-captainsim-boeing-behavior

wlrs-captainsim-b772-ge90

You do not need to modify the first two files.  Just make
sure they are in your Community folder.

(The Community Folder is typically located at
C:\Users\[YOUR NAME]\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\Packages\Community)

Here are the three key steps:

1) A) MAKE A COPY of the folder

         wlrs-captainsim-b772-ge90

   B) RENAME it to

         wlrs-captainsim-b772-PW-Store

         (The precise name is not important,
         so long as you can distinguish it
         from the 772-GE90 file.)

      Place it in the Community folder.

2) A) Go to your MSFS Official/OneStore folder where your Store
      version of the 777-200ER is located. This folder is typic-
      ally at:
C:\Users\[YOUR NAME]\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\Packages\Official\OneStore
      For the PW version, look for the folder

           captainsim-aircraft-p872

   B) Click on it, then click on SimObjects, then click on Airplanes.
      You will see a folder

           CS772ER_PW
   
      CAREFULLY copy the folder's EXACT NAME ONLY.
      (The name will be different if you have the
      777-200 RR or GE MSFS Store versions.)

3) Now go back to the folder (in the Community folder)

           wlrs-captainsim-b772-PW-Store

   This is the one you have copied from the 772-ge90 folder
   in Step 1.

   A) Click on it, then click on SimObjects, then click on Airplanes.
      You will see a folder

            CS_B777-200ER_GE90B
            
      RENAME it to the name you have copied in Step 2B.
      (For the 777-200 PW version it is CS772ER_PW)

    B) Go back up two levels. You will see a file called

            layout.json

       MAKE A BACKUP COPY -- you can name it

            layout.json.OFF

       i.  If you know how to use an external program to scan all
           the files and modify layout.json (such as MSFSLayoutGenerator.exe
           available on various flight simming sites), do that now.
           Otherwise go to ii.

        ii:Open the file
            layout.json
           using Notepad.

           CAREFULLY do a Find and Replace-All.

            FIND CS_B777-200ER_GE90B
            REPLACE it with CS772ER_PW
            It is best to use REPLACE ALL

       SAVE this file -- make sure it
       is still called layout.json

Make sure the following three files are in your Community Folder:

   wlrs-captainsim-boeing-base

   wlrs-captainsim-boeing-behavior

   wlrs-captainsim-b772-PW-Store

(You can also place these files in the Official/Store Folder -
it doesn't seem to matter).

That's it!

For the MSFS Store 777-300ER (77W) substitute
the file

       wlrs-captainsim-b77w-ge90

for the wlrs-captainsim-b772-ge90 file in the
above steps.  It should work.

For the MSFS Store 777 Freighter substitute the file
       wlrs-captainsim-b77f-ge90

For the 777-200LR, 777-300 PW and RR
unfortunately there are no appropriate files
to work with (These are not ER versions and
are quite different from the 777-300ER)

For the 777-200LR you can try using the
wlrs-captainsim-b77f-ge90 file, as the -200LR is
basically the same as the -F, but it will have cargo
loads instead of passenger ones.