Online there are newer versions indicated. Fujitsu is not giving me access to the receipts app or more recent versions of the software in win nor osx because my 100% fully functional S1500 is no longer supported. Stumbled here while trying to figure out a local (non cloud) receipt scanning solution and what is going on with ScanSnap on the mac side. Hopefully we'll see a 64-bit ScanSnap suite before this fall's deadline. There are very few things in my workflow that I couldn't replace…but replacing my ScanSnap and everything it does for me would be quite difficult. This blurb was obviously prepared as a response to those complaining about the new 32-bit warning dialog in macOS 10.13.4, but it does seem to address the longer-term question: Fujitsu is planning to 'resolve this,' which hopefully implies 64-bit versions are in our future, though at some not-yet-disclosed date. In the meantime, please continue using the latest version of the software available. PFU is going to resolve this, but the resolution date is not set yet.

The message is only inform that the application needs to be modified for compatibility with next-generation macOS (which should be available near the end of the year). There is no problem in the behavior of the application or the OS concerned. I haven't seen a reply on Twitter, but a (clearly form letter) reply to my email is at least somewhat encouraging:

So I both tweeted at them and sent them an email. While Fujitsu has been good about updating their software in the past, I was a bit concerned about the upcoming 64-bit transition. This is the software bundled with the ScanSnap ix500 scanner. But there's one suite of apps that I use every day, usually multiple times a day: Fujitsu's ScanSnap apps. A fair number of my apps are still 32-bit- see how many you still have-though many I don't really care about all that much.

Scansnap ix500 install