The 2.0 version of WebIS is available for downloading through the download page at Software Informer. This is the latest version available for Windows computers. The new version works on Apple enabled devices like Macbook, iOs, and partially for Android.
I have tried installing the software on Windows 8.1 64bit and it works, but it needs a compatible Outlook version. Yes, you can install it on 64bit version, but the support doesn't exist.