I can confirm with 100% certainty that you only need to install the driver from the 64-bit folder if that is your architecture. His build system automatically compiles both, in those same directory structures. You just need to install the one that matches your system. If you were to extract the bouncer_demo.exe installer with 7-Zip, you will see similar directory structure, although in that case the installer determines system architecture automatically and installs appropriate driver. I think what is confusing the situation is that the installer is mistakenly copying to SysWOW64 as well. I have tested a few dozen builds now and were all installed manually by INF, up until new installer. All of those previous (and current) builds have never copied to the SysWOW64 folder, with the exception of when using this installer. So it's a mistake in the installer. I'll talk to Florian in the morning as well and see what part of the installer caused it and it should be a very quick fix. Anyone running current build wont need to reinstall since the fix in this case would only be with the installer, not the contents. I would like to get confirmation from Florian first though before I recommend anyone to delete driver in SysWOW64.