I agree with those above who deplore Fujitsu’s policy of “obsoleting” perfectly good scanners.
The problem is even worse, however. The new 64-bit software comes with restrictions that substantially limit the traditional concept of ownership of property. The new software apparently is licensed to only one computer and cannot be shared among computers. There will be limitations (that I don’t fully understand) regarding transferring ownership of the scanner to others, since the proprietary software is required to operate the scanner. This is discussed in more detail in another MPU discussion thread (link previously posted in Christian’s post above):
https://talk.macpowerusers.com/t/does-anyone-use-scansnap-home-software/8582
The “old” software for my ScanSnap, the S1500M, is no longer available on Fujitsu’s website. This is tantamount to burning the bridges on the path to certain obsolesce of this and other scanner models that are otherwise perfectly functional. The withdrawal of the legacy software is simply spiteful. Fortunately, I have saved .dmg files of the “old” software so that I can continue to use my scanner for those Mac computers that operate under current or prior versions of macOS the support 32-bit software.
I am not likely be a purchaser of Fujitsu products again, and I urge David and Katie to reconsider recommending them.