0👍
When you work in dev mode after build all the files kept inside the resource directory. like
app
|- dlls
|- app.exe
|- resources
|- app(folder) all the JS files kept inside this.
But in case of prod
app
|- dlls
|- app.exe
|- resources
|- app.asar all the JS files kept inside this zip.
so first check where to kep this and how you try to access this db file .
Hope it will work.
Source:stackexchange.com