

https://learn.microsoft.com/en-us/sysinternals/downloads/process-explorer
Start process explorer, start the app, look and see what files it has open.
You can also try opening the EXE as a zip file.
If the assets are compiled into the EXE, there’s a chance that if you put assets in an identical structure outside of the EXE, it’ll let you override them.


The idea is you use the sysinternals to scrape the file handles as the app opens. It’ll log it and you can go back to the log and look. You just have to add the application as a filtered application.
If it’s opening them from anywhere in the disk, that’ll show up.