web3j command-line does not recognize flags

I am trying to run the command such as

web3j solidity generate -b SimpleBank/SimpleBank.bin -a SimpleBank/SimpleBank.abi -o ~/IdeaProjects/quiknode/src/main/java/ -p com.simplebank

Found here: https://blog.quiknode.io/web3j-ethereum-for-java-developers/

However, the web3j says :

Unknown opitions: -b, ...

Version is 1.4.1

Also, their docs of wrappers forward to a 404 page.
At this point, coding a wrapper by hand looks like the best option.

Edit: for the purpose of a code generating, I took the Java source-code for web3j/codegen and ran it against my own .abi and .bin files. However, since this post is about the command line interface, this is not the answer.