I recommend downloading the latest version of the software because it doesn't have that error. I've visited the official website and downloaded Busy 16, then start the installation process and I was able to even start it on Windows 10 64bit. Also, the latest version was updated in January 2017, therefore you should expect full compatibility.
On that page you also have various packages and support files in case you ever need them.
I couldn't find anything about that runtime error despite of my search queries on various websites.