I'm pretty sure I installed the B-52 Driver directly into FSX-SE by browsing to the FSX-SE folder. All the Captain Sim products for FSX, that aren't updated to install in FSX-SE gave me that option.

Note. It is possible that this only happened because I had installed and activate FSX in Win 10 Pro, and although I could install Acceleration, I couldn't activate it, so I ended uninstalling both of them. :(

[edit]I checked on my laptop, and it must have been installed the same way, yet I have never had FSX/Acceleration installed on it[/edit]