The current version 2.42 version is coming with a recent version of nwjs, and the author has chosen the 64 bits version of it (that's the reason of your problem).
Before (i.e. version 2.41 or older), it was an old 32 bits version.
But it's quite possible to still use a recent 32 bits version of nwjs:
- download it from the site:
You must be registered to see the links
(choose the "Downloads" button to have access to more versions, including the normal 32 bits version for Windows),
- then look at this post to use it with this game:
https://f95zone.to/threads/peasants-quest-v2-42-tinkerer.1717/post-6127853