The drivers are in a folder 'Drivers' which is in the same folder as the folder 'Designer' which contains the core/drivercore etc. projects. So the drivers projects reference the designer assemblies from that designer folder, hence the paths refer to that, and your location likely won't match, so you have to update the reference paths in the csproj.
There's no quick fix for this, as this is how the code is structured in our build system. The paths therefore are what they are.
The change you have to make is something we can look into however so you don't have to make it. Thing is tho: some people like to have scale 2 for currency, others want 4 (like you). You make this change as the values you receive from the DB always have scale ==4? Or is that just with your database?