We had a litte problem in the installer for the 64 Bit windows version. The file association with Blender files did not work. Some cobolds deleted a vital part in the installer script. The cobolds are catched, the installer is now fixed and reuploaded.
We recommend to uninstall the old version, redownload the 64 Bit installer, and reinstall Bforartists when the file association is missing. The new installer version will add the file association with blend files then. To check if it has worked, right click at a blend file, choose “open with”, and there you should find Bforartists in the list now.
Sorry for the inconvenience folks. Some bugs always makes it through …