Hey, I looked on the discussions here to try and figure this out when I couldn’t launch either. I found a fix for myself that may work for others!
(Scroll to “Definitive Edition” section for specifics, what follows next relates to the original outward.exe that was included with the DE and how to play that version even with DE installed)
You are right that the trainer is trying to find the Definitive Edition .exe, and it doesn’t find it by default because of the way the Steam version updated. I bought this game before definitive edition released and these just wouldn’t launch for me, because I apparently had the old version of Outward, even though I saw the big WeMOD “Play” button lit up. I was able to navigate to the original Outward on WeMOD, link my “Outward.exe” to it, and was able to launch that version of the game (after putting it in beta as instructed, did not effect saves when switched which was nice).
FOR DEFINITIVE EDITION:
When upgrading to the DE through the purchase of the Three Brothers DLC (or now just simply buying the game since the original is no longer sold because it is included in the DE), there is an entirely new folder in the Outward file. It looks like:
(driver Outward is stored on, usually (C:)
SteamLibrary
steamapps
common
Outward
Outward_Defed
That is where the file “Outward Definitive Edition.exe” can be found, as well as the other necessary files relating to DE. To get WeMOD to recognize and launch it, click the arrow to the side of the large “Play” button in the upper right corner. Find that “Outward Definitive Edition.exe” file by following the steps above, and drag that file into the designated area on that little menu under the “Play” button.
That should launch the proper .exe and the codes should work. You can either launch by pressing the “Play” button or the play symbol next to the .exe you just popped in there. It should launch from WeMOD like usual, no need to select a version of Outward from Steam when launched. I hope this helps, if so, pass it along. If not, I can try to troubleshoot, otherwise it very well may need an update.
(P.S the WeMOD codes work great in conjunction with the debug menu as well. If this still doesn’t work, the debug menu (simply search “outward debug menu,” click on the wiki and follow instructions) includes a lot of the codes here, like maxed stats and health, as well as item spawns and more)